* parse_about_memory.py
- remove extraneous data variable.
* test_memory_usage.py
- get webRootDir, resultsDir from testvars to support mach command.
- standardize directories.
- catch exceptions thrown by marionette when closing tabs.
* awsy_script.py
- change to use webRootDir, resultsDir and to pass to test_memory_usage.py
in additional testvars.json file.
- standardize directories.
- set strict=False in StructuredOutputParser in order to prevent ascii
encoding errors due to marionette loading csdn.net and outputing non-ascii
to stdout.
