Moved StreamHandler class into TestRunnerAgent.py file per pull request feedback. Now using already imported TestRunnerAgent module from within testrunner.py to access StreamHandler class.

Also general cleanup on testrunner.py and TestRunnerAgent.py (line lengths, etc.) because formatting bothered me this morning.
The rest of the last commit, accidentally only committed the first file. Moved StreamHandler class into TestRunnerAgent.py file per pull request feedback. Now using already imported TestRunnerAgent module from within testrunner.py to access StreamHandler class.

Also general cleanup on testrunner.py and TestRunnerAgent.py (line lengths, etc.) because formatting bothered me this morning.