Removing usage of vagrant-berkshelf

As of this commit, vagrant-berkshelf isn't playing nicely with the other
plugins, so the testing instructions have been updated not to use it.

Change-Id: I43133a779bf190b66c539ab5ca5e785a4377d191
Updating identity-bind to use 0.0.0.0

This change is required to allow for keystone client to connect from
outside of vagrant. Also setting identity backend to templated. Also
updating the Vagrantfile to expose the keystone port-forwards.

Change-Id: If4d4ed8c3d6ef7457b172c5afdb03d0762d19bb6
Merge "Updating identity-bind to use 0.0.0.0"