Merge "Add oslo_service package to heat"

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

 FROM %%KOLLA_NAMESPACE%%/%%KOLLA_PREFIX%%base:%%KOLLA_TAG%%
 MAINTAINER Kolla Project (https://launchpad.net/kolla)
 
+# TODO(inc0): when oslo_service lands in delorean, change pip to yum
 # necessary until https://bugzilla.redhat.com/show_bug.cgi?id=1229477 is fixed
-RUN yum -y install python-oslo-policy && yum clean all
+RUN yum -y install python-oslo-policy && yum clean all && pip install oslo.service
 
 RUN mkdir -p /opt/kolla
 COPY config-heat.sh /opt/kolla/config-heat.sh