Fix pd-queue status command

[Clivern]

I get the following error from current command. The throttled column is not properly implemented & buggy.

$ pd-queue status

Traceback (most recent call last):
  File "/usr/bin/pd-queue.py", line 150, in <module>
    main()
  File "/usr/bin/pd-queue.py", line 137, in main
    args.func(load_agent_config(), parser, args)
  File "/usr/bin/pd-queue.py", line 118, in _status
    print(fmt % ("Service Key", "Pending", "Success", "In Error"))
          ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TypeError: not enough arguments for format string

after the fix

$ pd-queue status

Service Key                           Pending   Success  In Error
=================================================================
c6ea32972b84495d81b4536c17a25ac7            0         3         0