Use tracking label for logging

If there is a tracking label (new) then lets log this

Use the global MiqQueue#task_id for backwards compatibility.

lib/gems/pending/util/vmdb-logger.rb

@@ -159,8 +159,8 @@ def call(severity, time, progname, msg)
 
     def prefix_task_id(msg)
       # Add task id to the message if a task is currently being worked on.
-      if $_miq_worker_current_msg && !$_miq_worker_current_msg.task_id.nil?
-        prefix = "Q-task_id([#{$_miq_worker_current_msg.task_id}])"
+      if (task_id = (Thread.current["tracking_label"] || $_miq_worker_current_msg.try(:task_id)))
+        prefix = "Q-task_id([#{task_id}])"
         msg = "#{prefix} #{msg}" unless msg.include?(prefix)
       end