ResponseBuilder mimeType check is too strict on net461

[Mpdreamz]

as mimetype includes encoding when using HttpWebRequest

[Mpdreamz]

[xUnit.net 00:01:08.0581106]     Tests.ClientConcepts.Troubleshooting.AuditTrail.AvailableOnResponse [FAIL]
	at org.elasticsearch.common.time.JavaDateMathParser.parseDateTime(JavaDateMathParser.java:224) ~[elasticsearch-7.1.0.jar:7.1.0]
	... 26 more
Caused by: java.time.format.DateTimeParseException: Failed to parse with all enclosed parsers
	at org.elasticsearch.common.time.JavaDateFormatter.doParse(JavaDateFormatter.java:143) ~[elasticsearch-7.1.0.jar:7.1.0]
	at org.elasticsearch.common.time.JavaDateFormatter.parse(JavaDateFormatter.java:114) ~[elasticsearch-7.1.0.jar:7.1.0]
	at org.elasticsearch.common.time.JavaDateMathParser.parseDateTime(JavaDateMathParser.java:224) ~[elasticsearch-7.1.0.jar:7.1.0]
	... 26 more
Failed   Tests.ClientConcepts.Troubleshooting.AuditTrail.AvailableOnResponse
Error Message:
 Expected collection to contain only items matching ((a.Ended - a.Started) > TimeSpan.Zero), but {Event: SniffOnStartup Took: 00:00:00, Event: SniffSuccess Node: http://localhost:9200/ NodeAlive: TrueTook:  Took: 00:00:00} do(es) not match.

Ping seems flakey since the sniff succeeded to fast.

[Mpdreamz]

ANother failure is intermittent as well

Invalid NEST response built from a unsuccessful (503) low level call on GET: /_xpack/usage?pretty=true&error_trace=true
# Audit trail of this API call:
 - [1] BadResponse: Node: https://localhost:9200/ Took: 00:00:00.0923295
# OriginalException: Elasticsearch.Net.ElasticsearchClientException: Request failed to execute. Call: Status code 503 from: GET /_xpack/usage?pretty=true&error_trace=true. ServerError: Type: unavailable_shards_exception Reason: "at least one primary shard for the security index is unavailable"
# Request:
<Request stream not captured or already read to completion by serializer. Set DisableDirectStreaming() on ConnectionSettings to force it to be set on the response.>
# Response:
{
  "error" : {
    "root_cause" : [
      {
        "type" : "unavailable_shards_exception",
        "reason" : "at least one primary shard for the security index is unavailable",
        "stack_trace" : "UnavailableShardsException[at least one primary shard for the security index is unavailable]\r\n\tat org.elasticsearch.xpack.security.support.SecurityIndexManager.getUnavailableReason(SecurityIndexManager.java:146)\r\n\tat org.elasticsearch.xpack.security.authc.esnative.NativeUsersStore.getUserCount(NativeUsersStore.java:171)\r\n\tat org.elasticsearch.xpack.security.authc.esnative.NativeRealm.lambda$usageStats$1(NativeRealm.java:53)\r\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:61)\r\n\tat org.elasticsearch.xpack.security.authc.support.CachingUsernamePasswordRealm.lambda$usageStats$5(CachingUsernamePasswordRealm.java:203)\r\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:61)\r\n\tat org.elasticsearch.xpack.core.security.authc.Realm.usageStats(Realm.java:137)\r\n\tat org.elasticsearch.xpack.security.authc.support.CachingUsernamePasswordRealm.usageStats(CachingUsernamePasswordRealm.java:201)\r\n\tat org.elasticsearch.xpack.security.authc.esnative.NativeRealm.usageStats(NativeRealm.java:52)\r\n\tat org.elasticsearch.xpack.security.authc.Realms.usageStats(Realms.java:243)\r\n\tat org.elasticsearch.xpack.security.SecurityFeatureSet.usage(SecurityFeatureSet.java:144)\r\n\tat org.elasticsearch.xpack.core.action.TransportXPackUsageAction.lambda$masterOperation$0(TransportXPackUsageAction.java:70)\r\n\tat org.elasticsearch.xpack.core.common.IteratingActionListener.run(IteratingActionListener.java:102)\r\n\tat org.elasticsearch.xpack.core.action.TransportXPackUsageAction.masterOperation(TransportXPackUsageAction.java:93)\r\n\tat org.elasticsearch.xpack.core.action.TransportXPackUsageAction.masterOperation(TransportXPackUsageAction.java:31)\r\n\tat org.elasticsearch.action.support.master.TransportMasterNodeAction.masterOperation(TransportMasterNodeAction.java:127)\r\n\tat org.elasticsearch.action.support.master.TransportMasterNodeAction$AsyncSingleAction$2.doRun(TransportMasterNodeAction.java:208)\r\n\tat org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:751)\r\n\tat org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37)\r\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)\r\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)\r\n\tat java.lang.Thread.run(Thread.java:748)\r\n"
      }
    ],
    "type" : "unavailable_shards_exception",
    "reason" : "at least one primary shard for the security index is unavailable",
    "stack_trace" : "UnavailableShardsException[at least one primary shard for the security index is unavailable]\r\n\tat org.elasticsearch.xpack.security.support.SecurityIndexManager.getUnavailableReason(SecurityIndexManager.java:146)\r\n\tat org.elasticsearch.xpack.security.authc.esnative.NativeUsersStore.getUserCount(NativeUsersStore.java:171)\r\n\tat org.elasticsearch.xpack.security.authc.esnative.NativeRealm.lambda$usageStats$1(NativeRealm.java:53)\r\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:61)\r\n\tat org.elasticsearch.xpack.security.authc.support.CachingUsernamePasswordRealm.lambda$usageStats$5(CachingUsernamePasswordRealm.java:203)\r\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:61)\r\n\tat org.elasticsearch.xpack.core.security.authc.Realm.usageStats(Realm.java:137)\r\n\tat org.elasticsearch.xpack.security.authc.support.CachingUsernamePasswordRealm.usageStats(CachingUsernamePasswordRealm.java:201)\r\n\tat org.elasticsearch.xpack.security.authc.esnative.NativeRealm.usageStats(NativeRealm.java:52)\r\n\tat org.elasticsearch.xpack.security.authc.Realms.usageStats(Realms.java:243)\r\n\tat org.elasticsearch.xpack.security.SecurityFeatureSet.usage(SecurityFeatureSet.java:144)\r\n\tat org.elasticsearch.xpack.core.action.TransportXPackUsageAction.lambda$masterOperation$0(TransportXPackUsageAction.java:70)\r\n\tat org.elasticsearch.xpack.core.common.IteratingActionListener.run(IteratingActionListener.java:102)\r\n\tat org.elasticsearch.xpack.core.action.TransportXPackUsageAction.masterOperation(TransportXPackUsageAction.java:93)\r\n\tat org.elasticsearch.xpack.core.action.TransportXPackUsageAction.masterOperation(TransportXPackUsageAction.java:31)\r\n\tat org.elasticsearch.action.support.master.TransportMasterNodeAction.masterOperation(TransportMasterNodeAction.java:127)\r\n\tat org.elasticsearch.action.support.master.TransportMasterNodeAction$AsyncSingleAction$2.doRun(TransportMasterNodeAction.java:208)\r\n\tat org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:751)\r\n\tat org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37)\r\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)\r\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)\r\n\tat java.lang.Thread.run(Thread.java:748)\r\n"
  },
  "status" : 503
}