Install virsh for Centos

Virsh binary is not part of the package libvirt-daemon-kvm and it's not
installed by dependecy. So `libvirt_package` was converted to a list
and `libvirt-client` is installed additionally, which provides virsh.

Change-Id: I967fd6e20e18310b4599fa00d003d7424ed73ae5

releasenotes/notes/libvirt_packages-e826dec75312c077.yaml

@@ -0,0 +1,5 @@
+---
+upgrade:
+  - |
+    Variable `libvirt_package` in ceph_client role has been renamed to
+    `libvirt_packages` and converted from string to a list.

vars/debian.yml

@@ -35,7 +35,9 @@ ceph_apt_repo_url_region: "download"  # or "eu" for Netherlands based mirror
 ceph_apt_repo_url: "http://{{ ceph_apt_repo_url_region }}.ceph.com/debian-{{ ceph_stable_release }}/"
 
 # LibVirt differentials between Debian and Ubuntu
-libvirt_package: "{{ (ansible_distribution == 'Debian') | ternary('libvirt-daemon-system', 'libvirt-bin') }}"
+libvirt_packages:
+  - "{{ (ansible_distribution == 'Debian') | ternary('libvirt-daemon-system', 'libvirt-bin') }}"
+
 libvirt_service_name: libvirtd
 
 python_ceph_packages:

vars/main.yml

@@ -33,7 +33,7 @@ ceph_components:
       - '{{ cinder_backup_ceph_client }}'
     service: '{{ ceph_cinder_service_names }}'
   - component: nova_compute
-    package: "{{ [ libvirt_package, 'ceph-common' ] + python_ceph_packages  }}"
+    package: "{{ libvirt_packages + [ 'ceph-common' ] + python_ceph_packages  }}"
     client:
       - '{{ nova_ceph_client }}'
     service: '{{ ceph_nova_service_names }}'

vars/redhat-7.yml

@@ -23,7 +23,10 @@ epel_gpg_keys:
   # Extra Packages for Enterprise Linux 7
   - key: /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
 
-libvirt_package: libvirt-daemon-kvm
+libvirt_packages:
+  - libvirt-daemon-kvm
+  - libvirt-client
+
 libvirt_service_name: libvirtd
 
 python_ceph_packages:

vars/suse.yml

@@ -13,7 +13,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-libvirt_package: qemu-kvm
+libvirt_packages:
+  - qemu-kvm
+
 libvirt_service_name: libvirtd
 
 python_ceph_packages: