Add integration tests to the Horizon gate

Initial attempt at a job inspired by the existing scripts for the
Neutron and Swift functional tests.

Change-Id: I12b6150dc6a320a3a4ddff189ff5153eece9f0de
Partial-Bug: #1355186
Add keystone-formula project

this is a SaltStack formula used for installing Openstack Keystone

* Add keystone-formula
* Add gerrit salt-formula-core group for all salt formula projects.

Change-Id: Ibf6911996f333f1ef3b078b550881a7fa2f27e89
Merge "Add integration tests to the Horizon gate"
Merge "Add keystone-formula project"