Lowercase query match string for process_handler

[skoranda]

Add logic to lowercase the query text or match string for the
process_handler to make its behavior consistent with the API
search_handler so that a frontend can point at either search URL and
observe the same case behavior.

All Submissions:

• [X ] Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• [X ] Have you added an explanation of what problem you are trying to solve with this PR?
• [X ] Have you added information on what your changes do and why you chose this as your solution?
• Have you written new tests for your changes?

There does not appear to be a test harness yet for testing the process_handler.

• [ X] Does your submission pass tests?

The same tests pass before and after the change.

• This project follows PEP8 style guide. Have you run your code against the 'flake8' linter?

The current code base is not following PEP8 at this time.

[coveralls]

Coverage remained the same at 68.438% when pulling f385e99 on skoranda:lowercase_query_process_handler into a7eeafb on IdentityPython:master.

[coveralls]

Coverage remained the same at 68.438% when pulling f385e99 on skoranda:lowercase_query_process_handler into a7eeafb on IdentityPython:master.