XD-847 Revise the available hadoopDistro options

Available options now are hadoop12 (default), cdh4, hdp13, phd1, hadoop20
XD-880 Update Java Version to 7
XD-870 Add Modules List support to XD

XD-870 Full test code coverage for module commands
Renamed ModuleType.equals to equalsType.  Because Sonar was complaining about it.

XD-870 ModuleHandler is now in correct package.
Was in rest package.
XD-870 Now handles requests made by Code Review
The "in" directory exception is no longer needed.
XD-870 now supports the updates made in XD-887