Adding thread safety info

Author: dougqh

dd-java-agent/agent-bootstrap/src/main/java/datadog/trace/bootstrap/InitializationTelemetry.java

@@ -5,7 +5,7 @@
 import java.lang.invoke.MethodType;
 
 /**
- * Wrapper around BootstrapInitializationTelemetry used inside the Datadog ClassLoader.
+ * Thread safe wrapper around BootstrapInitializationTelemetry used inside the Datadog ClassLoader.
  *
  * <p>Right now, this is needed because of the build separation between the two portions of the
  * bootstrap. We should consider adjusting the build to allow Agent et al to reference

dd-java-agent/src/main/java/datadog/trace/bootstrap/BootstrapInitializationTelemetry.java

@@ -3,7 +3,7 @@
 import java.io.IOException;
 import java.util.concurrent.TimeUnit;
 
-/** Telemetry class used to relay information about tracer activation. */
+/** Thread safe telemetry class used to relay information about tracer activation. */
 public abstract class BootstrapInitializationTelemetry {
   /** Returns a singleton no op instance of initialization telemetry */
   public static final BootstrapInitializationTelemetry noOpInstance() {