Use openstack/requirements for ceilometer

See Iccb4e99f8e4b6659a19c1817d0f4c697824af25c for context.

Change-Id: I3dd452d0cf502c0adf892b67b152de1c8930c77f
Partial-Bug: #150530

docker/ceilometer/ceilometer-base/Dockerfile.j2

@@ -6,7 +6,7 @@ MAINTAINER Kolla Project (https://launchpad.net/kolla)
 ADD ceilometer-base-archive /ceilometer-base-source
 RUN ln -s ceilometer-base-source/* ceilometer \
     && useradd --user-group ceilometer \
-    && pip --no-cache-dir install /ceilometer \
+    && pip --no-cache-dir install -c requirements/upper-constraints.txt /ceilometer \
     && mkdir -p /etc/ceilometer /var/log/ceilometer /home/ceilometer \
     && cp -r /ceilometer/etc/* /etc/ceilometer/ \
     && chown -R ceilometer: /etc/ceilometer /var/log/ceilometer /home/ceilometer