Install heat-dashboard in rpm based distros
Install heat-dashboard in rpm based distros

The heat-dashboard was recently packaged in RDO [1], let's add it to
the rpm based distros.

 [1] https://github.com/rdo-packages/heat-dashboard-distgit

Change-Id: I0652e172f3651b427805aa3673527677bd3429d8
Related-Bug: #1752132

rahulunair/kolla,stackforge/kolla,openstack/kolla,openstack/kolla,rahulunair/kolla,stackforge/kolla,stackforge/kolla