Add unit and integration tests for hang_analyzer

We've seen changes for Python linting and GDB modules that caused failures when the hang_analyzer was invoked. It would be helpful if testing could be added to the buildscripts_test test suite for hang_analyzer which performs the following:

• Attaches to a mongod, mongo & resmoke (python) process
• Attaches to a static core file which contains a lock and creates a lock graph