fixes #7445 and BZ1139894 - optionally utilize the RHSCL

This will optionally create a local repo if the ISO contains
the RHSCL repository.  This allows users to install without
a remote RHSCL repository
Merge pull request #42 from mccun934/20140912-1203

fixes #7445 and BZ1139894 - optionally utilize the RHSCL