Forced to use v1 for testing.

Author: AlexeyKuznetsov-DD

dd-trace-api/src/main/java/datadog/trace/api/ConfigDefaults.java

@@ -90,7 +90,8 @@ public final class ConfigDefaults {
       Arrays.asList("user.id", "session.id", "account.id");
   static final boolean DEFAULT_JMX_FETCH_ENABLED = true;
 
-  static final String DEFAULT_TRACE_AGENT_PROTOCOL_VERSION = "0.4";
+  // forced to use 1.0 for testing only, rollback to "0.4" before merging to master;
+  static final String DEFAULT_TRACE_AGENT_PROTOCOL_VERSION = "1.0";
 
   static final boolean DEFAULT_CLIENT_IP_ENABLED = false;