Introduces Openstack-Specific Report Utilities

Introduces classes representing various Openstack-specific
views, data models, and generators.  This commit also introduces
the folder for generators, since the only predefined generators are
those which are Openstack-specific.

Change-Id: Ice56cb63b2a9807b15642d7cfa4f24a507c70266
Implements: bp guru-meditation-report
Merge "Introduces Openstack-Specific Report Utilities"