Fix layout after cleanup

Closes-Bug: #1307183

Change-Id: If2c53f169db2ce3734d7edccb8842c90f228f04c
Merge "Fix layout after cleanup"
Support for zabbix

-added required entries in openstack.yaml
-changed deployment ordering so zabbix will always be deployed first
-added UI check to prevent assigning multiple zabbix servers in an environment
-added a link to zabbix dashboard after a successful deployment w/ zabbix

Change-Id: Ia417f7cc64d0027532d0dadc0553bcaa986abcff
Implements: blueprint monitoring-system