BZ #1104093 - Tweak settings for ML2 as default.

https://bugzilla.redhat.com/show_bug.cgi?id=1104093

ML2 changes should be on controller _only_.
BZ #1108750 - enable verbose setting on neutron compute.

https://bugzilla.redhat.com/show_bug.cgi?id=1108750

Use the passed in $verbose value to set neutron setting on compute node.
Fix neutron notifications configuration and server.

- Server should only be running on the control node.
- Notifications shoudl be configured on control and compute nodes.
Merge pull request #263 from jguiditta/bz1104093_ml2_default

BZ #1104093 - Tweak settings for ML2 as default.