bz 1126072: deploy one compute host, then the rest

This requires a db migration and then re-running seed data before
testing the change
missed the migration in the initial commit
Fix autoreload issues in development mode
"first compute alone" functionality is only needed for nova
Merge pull request #273 from sseago/compute-deploy-sequence

bz 1126072: deploy one compute host, then the rest
Merge pull request #274 from ares/master

Fix autoreload issues in development mode
BZ #1122663 - Add Generic RHEL 7 and Ceph OSD node types

https://bugzilla.redhat.com/show_bug.cgi?id=1122663

This patch creates two new roles. A Generic RHEL 7 role and a Ceph OSD
node role. The Ceph OSD role does not have any additional configuration,
as the installation of Ceph will be handled externally.
Add notification of addl work when a ceph node is deployed

Ceph and Generic RHEL 7 nodes do nothing but have
quickstack::openstack_common applied. Give the user a notification when
a ceph node is deployed that additional steps are required.