Update supported environment variables.

Author: pglombardo

src/instana/agent.cr

@@ -316,7 +316,7 @@ module Instana
     # for docker in bridged mode.
     #
     def host_agent_ready?
-      run_discovery unless @discovered[:done]
+      run_discovery unless @discovered[:done]?
       if @discovered
         # Try default location or manually configured (if so)
         uri = URI.parse("http://#{@discovered[:agent_host]}:#{@discovered[:agent_port]}/")
@@ -390,7 +390,7 @@ module Instana
     #
     def ready?
       # In test, we"re always ready :-)
-      return true if ENV["INSTANA_GEM_TEST"]
+      return true if ENV["INSTANA_SHARD_TEST"]
 
       if forked?
         ::Instana.logger.debug "Instana: detected fork.  Calling after_fork"

src/instana/base.cr

@@ -27,15 +27,15 @@ module Instana
   # @return Bool
   #
   def self.debug?
-    ENV["INSTANA_GEM_DEV"]?
+    ENV["INSTANA_SHARD_DEV"]?
   end
 
   # Indicates whether we are running in the test environment.
   #
   # @return Bool
   #
   def self.test?
-    ENV["INSTANA_GEM_TEST"]?
+    ENV["INSTANA_SHARD_TEST"]?
   end
 end
 

src/instana/collector.cr

@@ -89,7 +89,7 @@ module Instana
         payload = enforce_deltas(payload, @last_values)
       end
 
-      if ENV["INSTANA_GEM_TEST"]?
+      if ENV["INSTANA_SHARD_TEST"]?
         true
       else
         # Report all the collected goodies

src/instana/config.cr

@@ -41,7 +41,7 @@ module Instana
       }
 
       # FIXME
-      # if ENV["INSTANA_GEM_DEV"]?
+      # if ENV["INSTANA_SHARD_DEV"]?
       #   @config[:collector][:interval] = 3
       # end
     end

src/instana/logger.cr

@@ -7,9 +7,9 @@ module Instana
 
     def initialize(*args)
       super(*args)
-      if ENV["INSTANA_GEM_TEST"]?
+      if ENV["INSTANA_SHARD_TEST"]?
         self.level = Logger::DEBUG
-      elsif ENV["INSTANA_GEM_DEV"]?
+      elsif ENV["INSTANA_SHARD_DEV"]?
         self.level = Logger::DEBUG
       else
         self.level = Logger::WARN

src/instana/tracing/processor.cr

@@ -77,7 +77,7 @@ module Instana
     #   - Prevent another run of the timer while this is running
     #
     def send
-      return if @queue.empty? || ENV["INSTANA_GEM_TEST"]?
+      return if @queue.empty? || ENV["INSTANA_SHARD_TEST"]?
 
       size = @queue.size
       if size > 100