Preparing release 1.9.0 (jaegertracing#1292)

* Preparing release 1.9.0

Signed-off-by: Pavol Loffay <ploffay@redhat.com>

* Minor improvements

Signed-off-by: Pavol Loffay <ploffay@redhat.com>

* Update CHANGELOG.md

Author: pavolloffay

CHANGELOG.md

@@ -8,6 +8,18 @@ Changes by Version
 
 ##### Breaking Changes
 
+- Change Elasticsearch index prefix from `:` to `-` ([#1284](https://github.com/jaegertracing/jaeger/pull/1284), [@pavolloffay](https://github.com/pavolloffay))
+
+Changed index prefix separator from `:`  to `-` because Elasticsearch 7 does not allow `:` in index name.
+Jaeger query still reads from old indices containing `-` as a separator, therefore no configuration or migration changes are required.
+
+
+
+- Add CLI configurable `es.max-num-spans` while retrieving spans from ES ([#1283](https://github.com/jaegertracing/jaeger/pull/1283), [@annanay25](https://github.com/annanay25))
+
+The default value is set to 10000. Before no limit was applied.
+
+
 - Update to jaeger-lib 2 and latest sha for jaeger-client-go, to pick up refactored metric names ([#1282](https://github.com/jaegertracing/jaeger/pull/1282), [@objectiser](https://github.com/objectiser))
 
 Update to latest version of `jaeger-lib`, which includes a change to the naming of counters exported to
@@ -70,14 +82,29 @@ jaeger_http_server_errors{source="collector-proxy",status="5xx"}
 
 ##### New Features
 
-##### Bug fixes, Minor Improvements
+- Add tracegen utility for generating traces ([#1245](https://github.com/jaegertracing/jaeger/pull/1245), [@yurishkuro](https://github.com/yurishkuro))
+- Use DCAwareRoundRobinPolicy as fallback for TokenAwarePolicy ([#1285](https://github.com/jaegertracing/jaeger/pull/1285), [@vprithvi](https://github.com/vprithvi))
+- Add Zipkin Thrift as kafka ingestion format ([#1256](https://github.com/jaegertracing/jaeger/pull/1256), [@geobeau](https://github.com/geobeau))
+- Add `FindTraceID` to the spanstore interface ([#1246](https://github.com/jaegertracing/jaeger/pull/1246), [@vprithvi](https://github.com/vprithvi))
+- Migrate from glide to dep ([#1240](https://github.com/jaegertracing/jaeger/pull/1240), [@isaachier](https://github.com/isaachier))
+- Make tchannel timeout for reporting in agent configurable ([#1034](https://github.com/jaegertracing/jaeger/pull/1034), [@gouthamve](https://github.com/gouthamve))
+- Add archive traces to all-in-one ([#1189](https://github.com/jaegertracing/jaeger/pull/1189), [@pavolloffay](https://github.com/pavolloffay))
+- Start moving components of adaptive sampling to OSS ([#973](https://github.com/jaegertracing/jaeger/pull/973), [@black-adder](https://github.com/black-adder))
+- Add gRPC communication between agent and collector ([#1165](https://github.com/jaegertracing/jaeger/pull/1165), [#1187](https://github.com/jaegertracing/jaeger/pull/1187), [#1181](https://github.com/jaegertracing/jaeger/pull/1181) and [#1180](https://github.com/jaegertracing/jaeger/pull/1180), [@pavolloffay](https://github.com/pavolloffay))
 
-#### UI Changes
+##### Bug fixes, Minor Improvements
 
-##### New Features
+- Update exposed ports in ingester dockerfile ([#1289](https://github.com/jaegertracing/jaeger/pull/1289), [@objectiser](https://github.com/objectiser))
+- Upgrade Shopify/Sarama for proper handling newest kafka servers 2.x by ingester ([#1248](https://github.com/jaegertracing/jaeger/pull/1248), [@vprithvi](https://github.com/vprithvi))
+- Fix sampling strategies overwriting service entry when no sampling type is specified ([#1244](https://github.com/jaegertracing/jaeger/pull/1244), [@objectiser](https://github.com/objectiser))
+- Fix dot replacement for int ([#1272](https://github.com/jaegertracing/jaeger/pull/1272), [@pavolloffay](https://github.com/pavolloffay))
+- Add C* query to error logs ([#1250](https://github.com/jaegertracing/jaeger/pull/1250), [@vprithvi](https://github.com/vprithvi))
+- Add locking around partitionIDToState map accesses ([#1239](https://github.com/jaegertracing/jaeger/pull/1239), [@vprithvi](https://github.com/vprithvi))
+- Reorganize config manager packages in agent ([#1198](https://github.com/jaegertracing/jaeger/pull/1198), [@pavolloffay](https://github.com/pavolloffay))
 
-##### Bug Fixes, Minor Improvements
+#### UI Changes
 
+* UI pinned to version 1.0.0. The changelog is available here [v1.0.0](https://github.com/jaegertracing/jaeger-ui/blob/master/CHANGELOG.md#v100-january-18-2019)
 
 1.8.2 (2018-11-28)
 ------------------