Add CentOS support for os_nova

* only kvm host are supported right now.

Depends-On: Iff4a5999be0263a2c1843d7ca29843468cbc0ccc
Depends-On: I78fb85d44b5b0e1643bd07af3e15462c02041c89
Change-Id: Ie05c243daa7d2d46b5e8779371a363d95cc990e9

handlers/main.yml

@@ -13,12 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-- name: Restart libvirt-bin
-  service:
-    name: "libvirt-bin"
-    state: "restarted"
-    pattern: "libvirt-bin"
-
 - name: Reload systemd daemon
   command: "systemctl daemon-reload"
   notify:
@@ -29,6 +23,12 @@
   notify:
     - Restart nova services
 
+- name: Restart libvirt-bin
+  service:
+    name: "{{ libvirt_service_name }}"
+    state: "restarted"
+    pattern: "{{ libvirt_service_name }}"
+
 - name: Restart nova services
   service:
     name: "{{ item.value.service_name }}"