Enable ceilometer in rally-dsvm jobs

It enables all required ceilometer service to collect
notifications produce by OSprofiler.

It won't add any overhead to Ceilometer until we start
using OSprofiler.

To use OSprofiler we have to add special trace information in
request headers that will produce actually trigger profiler, 
that will send bunch of notifications.

This mostly will be used by Rally, and probably one of 
Tempest job, after we integrate osprofiler to tempest.

More about osprofiler:
https://github.com/stackforge/osprofiler

More about ceilometer plugin:
https://review.openstack.org/#/c/100239/

Sample of trace (via Cinder and Nova Services):
http://pavlovic.me/rally/profiler/

Change-Id: Id05bac4e5c0f09d82d120901ce1db8b0b13f9412

modules/openstack_project/files/jenkins_job_builder/config/rally.yaml

@@ -31,12 +31,18 @@
       - shell: |
           #!/bin/bash -xe
           export PROJECTS="stackforge/rally $PROJECTS"
-          export ENABLED_SERVICES=rally
+          export PROJECTS="openstack/ceilometer $PROJECTS"
           export DEVSTACK_GATE_NEUTRON={neutron}
           export DEVSTACK_GATE_EXERCISES=0
           export DEVSTACK_GATE_TIMEOUT=120
           export RALLY_SCENARIO={scenario}
 
+          ENABLED_SERVICES=rally,ceilometer-acompute,ceilometer-acentral,ceilometer-api
+          ENABLED_SERVICES+=,ceilometer-anotification,ceilometer-collector,
+          ENABLED_SERVICES+=,ceilometer-alarm-evaluator,ceilometer-alarm-notifier,
+
+          export ENABLED_SERVICES
+
           function pre_test_hook {{
               # Install rally-devstack integration
               cp -r $BASE/new/rally/contrib/devstack/* $BASE/new/devstack/