Revert "Fix for getting 0.15.1 el6/el5 RPMs on beaker-project.org"

This reverts commit 9e6d00afcf6727e568e1b6b4ad09906c54119dc7.
remove RHEL builds from source tree

These are pulled from Brew instead.
Merge "Revert "Fix for getting 0.15.1 el6/el5 RPMs on beaker-project.org""
Merge "remove RHEL builds from source tree"