Scheduler Task Thread - Update Logging

[road-cycling]

I confirm that this contribution is made under the terms of the license found in the root directory of this repository's source tree and that I have the authority necessary to make this contribution on behalf of its copyright owner.

Logging issue on task thread causes exception which halts thread.

[WARNING/MainProcess] Exception in thread Thread-4:
Traceback (most recent call last):
File "/home/python3.6/threading.py", line 916, in _bootstrap_inner
     self.run()
   File "/home/python3.6/threading.py", line 864, in run
     self._target(*self._args, **self._kwargs)
   File "/home/panoptes/yahoo_panoptes/framework/plugins/scheduler.py", line 182, in _plugin_scheduler_task_thread
     self._plugin_type_display_name, self._cycles_without_lock)
 TypeError: not enough arguments for format string

[coveralls]

Pull Request Test Coverage Report for Build 742

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 93.031%

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Totals
Change from base Build 739:	0.0%
Covered Lines:	5847
Relevant Lines:	6285

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💛 - Coveralls