first 1.2.0 release candidate
Upgraded hydra-head to version 6.4.0
Upgraded active-fedora to version 6.6.0
Version bumped to rc2
Upgraded Blacklight to v4.5.0.rc1.
Bumped version to 1.2.0.rc3.
Use Blacklight 4.5.0
Releasing version 1.2.0
Merge in release-1.2 branch