Libvirt needs openvswitch to connect br-int

Libvirt is trying to create a port on br-int and is
failing because ovs is not installed.

Co-authored-by: Ian Main <imain@redhat.com>
Closes-bug: 1552717
Change-Id: I6ed0c1ae5b27b58e4c22bcbe7e674f66cde48990

docker/nova/nova-base/Dockerfile.j2

@@ -9,6 +9,7 @@ RUN yum -y install \
         python-keystoneclient \
         python-cinderclient \
         bridge-utils \
+        openvswitch \
     && yum clean all
 
     {% elif base_distro in ['ubuntu'] %}
@@ -17,6 +18,7 @@ RUN apt-get install -y --no-install-recommends \
         nova-common \
         python-nova \
         bridge-utils \
+        openvswitch-switch \
     && apt-get clean
 
     {% endif %}
@@ -24,6 +26,7 @@ RUN apt-get install -y --no-install-recommends \
     {% if base_distro in ['centos', 'fedora', 'oraclelinux', 'rhel'] %}
 
 RUN yum -y install bridge-utils \
+        openvswitch \
     && yum clean all
 
     {% elif base_distro in ['ubuntu', 'debian'] %}