* Ceph Dumpling is the LTS release, it should be used instead of Emperor.
  The next stable/LTS release is going to be Firefly.
* CentOS is now using the CentOS repo instead of RHEL6 repo.
* RHEL is now using the RHEL6.4 repo instead of RHEL6.
* Added the ceph-extras repo for all. This includes needed packages
  that do not come (or are too old) on their specific distro.
* For RPM repos naming has been corrected and priorities added.
* Package name for the Google Perftools is corrected.

Signed-off-by: JuanJose "JJ" Galvez <jj.galvez@inktank.com>
Moved role constraints into model and removed edit deployment

(cherry picked from commit fabb9f67a2a75748423f423989da9841d422ee26)
Merge pull request #34 from vuntz/release/roxy/master

Moved role constraints into model and removed edit deployment
Merge pull request #29 from jgalvez/pull-req-release-roxy-master-c764bee5aeba3d276e615b7dfc09227a4552ba7d

Switch Ceph to use Dumpling, Fix Packages/Repos. [1/1]