RC4 with 2 extra files ASLv2 header fix

Remove external Python Module, gradle-wrapper.jar,more RAT cleanup wi…

…th license header injection

Cleaned up unnecessary jars, tars and RAT with all exceptions defined

RC1 for 2.0.0 beta. All IP issues are supposed to be cleaned

[JIRA: GPSQL-2650] Cablevision: Hotfix for GPSQL-2614

HAWQ/PXF 1.1.4.0 RC 1.