better logging for indexing service

merger/src/main/java/com/metamx/druid/merger/coordinator/ZkWorker.java

@@ -112,8 +112,6 @@ public class ZkWorker implements Closeable
   {
     return "ZkWorker{" +
            "worker=" + worker +
-           ", statusCache=" + statusCache +
-           ", cacheConverter=" + cacheConverter +
            ", lastCompletedTaskTime=" + lastCompletedTaskTime +
            '}';
   }

merger/src/main/java/com/metamx/druid/merger/coordinator/scaling/ResourceManagementScheduler.java

@@ -81,7 +81,6 @@ public class ResourceManagementScheduler
             @Override
             public void run()
             {
-              log.info("Running resource management strategy");
               resourceManagementStrategy.doProvision(
                   taskRunner.getPendingTasks(),
                   taskRunner.getWorkers()

merger/src/main/java/com/metamx/druid/merger/worker/Worker.java

@@ -84,4 +84,15 @@ public class Worker
   {
     return version;
   }
+
+  @Override
+  public String toString()
+  {
+    return "Worker{" +
+           "host='" + host + '\'' +
+           ", ip='" + ip + '\'' +
+           ", capacity=" + capacity +
+           ", version='" + version + '\'' +
+           '}';
+  }
 }