Change and create system classes for support Mitaka Ceilometer

Aodh and Ceilometer system classes were created in this commit.
Also keystone, galera and mysql classes were changed to support
aodh installation.

https://github.com/Mirantis/mk-lab-salt-model/pull/137
diff --git a/salt/master/formula/git/openstack.yml b/salt/master/formula/git/openstack.yml
index 17c40e9..f34b9b1 100644
--- a/salt/master/formula/git/openstack.yml
+++ b/salt/master/formula/git/openstack.yml
@@ -4,6 +4,10 @@
       environment:
         dev:
           formula:
+            aodh:
+              source: git
+              address: 'https://github.com/openstack/salt-formula-aodh.git'
+              revision: ${_param:salt_master_environment_revision}
             ceilometer:
               source: git
               address: 'https://github.com/openstack/salt-formula-ceilometer.git'