Don't run remove_ceph_mons when there are no controllers being deleted
Don't run remove_ceph_mons when there are no controllers being deleted

When not deleting controllers we don't need to worry about
removing Ceph MONs.

Change-Id: I6b8ee02a1936cff26a55204b716b627d45defddd
Closes-bug: #1453408

eayunstack/fuel-astute,stackforge/fuel-astute,eayunstack/fuel-astute,stackforge/fuel-astute