Add Octavia to Stackforge

Adding the project definition for the Octavia project - an LBaaS
reference implementation.

Includes:
 - Adds project to Stackforge
 - Gerritbot for Freenode in #openstack-lbaas
 - Adds basic Python Jenkins and Zuul jobs
 - Adds Gerrit ACLs for the repo

Change-Id: I1fcdefd295dc7f23be6fa66e523d269f6ca32b42
Merge "Add Octavia to Stackforge"