Adding the json file that populates the groups db

This json file contains the list of user groups and their details
much like the wiki page. The file is read by drupal to create the
map on groups.openstack.org and add details to the individual
pages of each group.

Change-Id: I9eece9226e9be014741f3d5cb372a5a4a955bcb5
Merge "Adding the json file that populates the groups db"