Implement installer.0 role. This allows one to place the ceph ansible installer node on another machine. It defaults back to the lowest monitor if there is no installer.0 role.
Implement installer.0 role.
This allows one to place the ceph ansible installer node on another machine.
It defaults back to the lowest monitor if there is no installer.0 role.

Signed-off-by: Warren Usui <d122d5448e7b8e3c7712d31fe87ec3c14cb94745@redhat.com>

dmick/teuthology,dmick/teuthology,SUSE/teuthology,SUSE/teuthology,ceph/teuthology,SUSE/teuthology,ceph/teuthology,ktdreyer/teuthology,ktdreyer/teuthology,dmick/teuthology