Add oslo package into base image

Add missing oslo dependency.

Closes-bug: #1469891
Change-Id: Ia7b0a5bc0d59f561a1cb6cdb0a50478cad9246d4

docker/centos/binary/base/Dockerfile

@@ -72,6 +72,7 @@ RUN yum install -y \
         python-oslo-config \
         python-oslo-messaging \
         python-oslo-rootwrap \
+        python-oslo-policy \
         python-paramiko \
         python-passlib \
         python-paste-deploy \

docker/centos/binary/heat/heat-base/Dockerfile

 FROM %%KOLLA_NAMESPACE%%/%%KOLLA_PREFIX%%base:%%KOLLA_TAG%%
 MAINTAINER Kolla Project (https://launchpad.net/kolla)
 
-RUN yum -y install python-oslo-policy && yum clean all
-
 RUN mkdir -p /opt/kolla
 COPY config-heat.sh /opt/kolla/config-heat.sh

docker/centos/binary/neutron/neutron-base/Dockerfile

@@ -4,7 +4,6 @@ MAINTAINER Kolla Project (https://launchpad.net/kolla)
 RUN yum -y install openstack-neutron \
                    openstack-neutron-ml2 \
                    python-neutron-client \
-                   python-oslo-policy \
-    && yum clean all
+                   && yum clean all
 
 COPY config-neutron.sh config-sudoers.sh /opt/kolla/