Install keystoneauthv1 in openstack-base image

Lots of tools rqeuire keystoneeauthv1 not just horizon

TrivialFix

Change-Id: I35eb958e35500b04657679371019f2e6f3c2f2dd

docker/horizon/Dockerfile.j2

@@ -6,7 +6,6 @@ MAINTAINER Kolla Project (https://launchpad.net/kolla)
 
 RUN yum -y install \
         openstack-dashboard \
-        python-keystoneauth1 \
         httpd \
         mod_wsgi \
     && yum clean all \

docker/openstack-base/Dockerfile.j2

@@ -33,6 +33,7 @@ RUN yum -y install \
         python-zaqarclient \
         python-openstackclient \
         MySQL-python \
+        python-keystoneauth1 \
     && yum clean all
 
     {% endif %}