Default to not include the host tag (#52)

* Default to not include the host tag

Author: justinjc

build.gradle

@@ -45,7 +45,7 @@ configurations.archives.artifacts.clear()
 
 allprojects {
     group = 'com.uber.m3'
-    version = '0.4.1'
+    version = '0.5.0'
 
     apply plugin: 'java'
     apply plugin: 'maven'

m3/src/main/java/com/uber/m3/tally/m3/M3Reporter.java

@@ -579,7 +579,7 @@ public static class Builder {
         // Non-generic EMPTY ImmutableMap will never contain any elements
         @SuppressWarnings("unchecked")
         protected ImmutableMap<String, String> commonTags = ImmutableMap.EMPTY;
-        protected boolean includeHost = true;
+        protected boolean includeHost = false;
         protected int maxQueueSize = DEFAULT_MAX_QUEUE_SIZE;
         protected int maxPacketSizeBytes = DEFAULT_MAX_PACKET_SIZE;
         protected int maxProcessorWaitUntilFlushMillis = 10_000;