Add ask.openstack.org to openstack-infra. Setup an all-in-one
askbot site based on existing deployment, including apache,
redis,apache solr,postgresql. See askbot.rst for further
details. Refactored to depend on vamsee's puppet solr module.
Depends-On: Iffe07d3a34087cb15151787bc683208425a27594
Change-Id: I36504eac7b953c3cce3e21a3559ac95b1bc12da7