Adds vnc_require_instance_uuid_as_password option

This is a new option for grizzly that requires the entering of
the uuid as a password before connection is made.

fixes bug 1128454

Change-Id: If0b0dd98ceaaf7ee483d5f9c58fbc4f754ab99a7
q-admin: update keystone + nova config section

bug 1156822

- added sections for new metadata & security groups flags
- updated vif-plugging section in light of port-bindings
- also cleaned up some incorrect references to 'OpenStack
Compute' where it should be 'OpenStack Identity'.
- other misc improvements as I saw them.

Change-Id: I47aec95aa961d362375d7c3f54ce32a9fbc29fce
Merge "q-admin: update keystone + nova config section"
Merge "Adds vnc_require_instance_uuid_as_password option"