Tukey Changes, Health Check and Netapp

There are three changes here:
1. Accommodations for the PDC Tukey deploy
2. Improved handling of gluster issues
3. Support for netapp

Changes to novacluster/builtin-themes.yaml and novacluster/novacluster.py are for tukey support. Currently the cloud name is "tcga". This should actually change to "pdc"  soon so these changes could be removed then.

Changes to novacluster/scripts/torque-node.sh provide the netapp support and also a health check script that marks a compute node as down if Gluster is down.