Modify deployment scripts to account for differences between UVA and ISIS opentack deployments

[hnine999]

deploy.py was originally written for UVA openstack to both deploy, perform configuration on, and collection information about the moodle workflow.

deploy.py was modified for ISIS openstack because ISIS openstack uses heat-templates to deploy machines. In particular, it was updated to include a "query mode" which only performs configuration and collects information.

Query mode needs to updated to:

• Collect information earlier in execution about all networks of which nodes are part
• Obtain information about the subnets of the tolopogy for a given moodle workflow. This is difficult because many subnets have the same name, and using the id of the project being used for the given moodle workflow to disambiguate them doesn't work at UVA, as the given workflow may use subnets from a different project.

[hnine999]

Modifications made. Modifications to "deploy-nodes.py" that are particular to the ISIS openstack cluster are only used in query mode, which is particular to the ISIS openstack cluster.