Updated openstack/openstack
Project: openstack-dev/devstack  99da4af55ef0c451983bcc5d7f97e1e22da168ea
null
Robustify shocco install and config

* shocco has some non-optional prereqs, make sure they are present if
shocco is being installed
* set the path to installed shocco correctly
* add the working dir to .gitignore

Change-Id: If786ea9e28d3595775f7b86d2fe760dff8047f49