fix: release_6.1 yum repo

- no gpg check for ICS repo
- clobbering existing srp-rhel.repo
- moving from release_7 -> release_6.1 repo

Change-Id: I15749639dbb72a80d66d059893a6f82e087e3b03
Merge pull request #40 from joshbronson/20140721_no_rhel_gpg_check

fix: release_6.1 yum repo