BZ #1104219 - Update HA Nova support for Icehouse.

[jguiditta]

https://bugzilla.redhat.com/show_bug.cgi?id=1104219

This includes making nova A/A by default. If you wish to make it A/P, simply
set scheduler_host_subset_size=1.

[jguiditta]

Note that this is not yet tested, so not ready for merge until testing is complete

[cwolferh]

Comes up cleanly on ha-all-in-one-controller:

Clone Set: openstack-nova-consoleauth-clone [openstack-nova-consoleauth]
     Started: [ c1a1.example.com c1a2.example.com c1a3.example.com ]
 Clone Set: openstack-nova-api-clone [openstack-nova-api]
     Started: [ c1a1.example.com c1a2.example.com c1a3.example.com ]
 Clone Set: openstack-nova-novncproxy-clone [openstack-nova-novncproxy]
     Started: [ c1a1.example.com c1a2.example.com c1a3.example.com ]
 Clone Set: openstack-nova-conductor-clone [openstack-nova-conductor]
     Started: [ c1a1.example.com c1a2.example.com c1a3.example.com ]
 Clone Set: openstack-nova-scheduler-clone [openstack-nova-scheduler]
     Started: [ c1a1.example.com c1a2.example.com c1a3.example.com ]

# openstack-status
...
== Nova managed services ==
+------------------+------------------+----------+---------+-------+----------------------------+-----------------+
| Binary           | Host             | Zone     | Status  | State | Updated_at                 | Disabled Reason |
+------------------+------------------+----------+---------+-------+----------------------------+-----------------+
| nova-consoleauth | c1a3.example.com | internal | enabled | up    | 2014-06-16T23:13:56.000000 | -               |
| nova-consoleauth | c1a1.example.com | internal | enabled | up    | 2014-06-16T23:13:56.000000 | -               |
| nova-consoleauth | c1a2.example.com | internal | enabled | up    | 2014-06-16T23:13:56.000000 | -               |
| nova-conductor   | c1a3.example.com | internal | enabled | up    | 2014-06-16T23:13:57.000000 | -               |
| nova-conductor   | c1a2.example.com | internal | enabled | up    | 2014-06-16T23:13:58.000000 | -               |
| nova-scheduler   | c1a2.example.com | internal | enabled | up    | 2014-06-16T23:13:58.000000 | -               |
| nova-conductor   | c1a1.example.com | internal | enabled | up    | 2014-06-16T23:13:58.000000 | -               |
| nova-scheduler   | c1a3.example.com | internal | enabled | up    | 2014-06-16T23:13:58.000000 | -               |
| nova-scheduler   | c1a1.example.com | internal | enabled | up    | 2014-06-16T23:13:59.000000 | -               |
+------------------+------------------+----------+---------+-------+----------------------------+-----------------+
== Nova networks ==
+----+-------+------+
| ID | Label | Cidr |
+----+-------+------+
+----+-------+------+
== Nova instance flavors ==
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
| ID | Name      | Memory_MB | Disk | Ephemeral | Swap | VCPUs | RXTX_Factor | Is_Public |
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
| 1  | m1.tiny   | 512       | 1    | 0         |      | 1     | 1.0         | True      |
| 2  | m1.small  | 2048      | 20   | 0         |      | 1     | 1.0         | True      |
| 3  | m1.medium | 4096      | 40   | 0         |      | 2     | 1.0         | True      |
| 4  | m1.large  | 8192      | 80   | 0         |      | 4     | 1.0         | True      |
| 5  | m1.xlarge | 16384     | 160  | 0         |      | 8     | 1.0         | True      |
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
== Nova instances ==
+----+------+--------+------------+-------------+----------+
| ID | Name | Status | Task State | Power State | Networks |
+----+------+--------+------------+-------------+----------+
+----+------+--------+------------+-------------+----------+