Omnibus Updates

* Update to Omnibus 1.3.0
* Update Omnibus cookbook to 1.2.2
* Update Vagrantfile to Omnibus 1.3.0 format


This change was successfully tested against all platforms in CI:
http://andra.ci.opscode.us/job/chef-server-trigger-ad-hoc/131/downstreambuildview/

/cc @seth