Merge pull request #17 from EricWittmann/master

Fix for https://bugzilla.redhat.com/show_bug.cgi?id=1055525
RTGOV-335 Update based on changes in overlord-commons to support multiple platforms.
RTGOV-341 Provide mechanism to enable alternative ActiveStore implementation to be specified in the rtgov properties
RTGOV-341 Further refinement - moved factory into activity module and called directly
Further refinement around the activity store - updated tests to directly use the factory, and updated factory impl to use context classloader