Removes un-needed cinder parameter

Depends on https://review.openstack.org/#/c/41170/

Cinder is always the default now,
therefore this option is not needed.

Change-Id: I87677af8ebfb0a50ab9fc5a869954de493f156f1
Expose nova security_group_api parameter

This exposes nova's security_group_api parameter so user can set
this accordingly to nova/neutron or something else if necessary.

Change-Id: I0f166220b819a20a8c6cbc08a4640f29dbac2a0a
Allow Controller to manage volumes

Both the basic install guide, and full install guide describe having the controller run cinder-volume:

http://docs.openstack.org/grizzly/basic-install/apt/content/basic-install_controller.html#basic-install_controller-cinder
http://docs.openstack.org/grizzly/openstack-compute/install/apt/content/cinder-install.html

Right now this only supports an LVM backend, but could be extended in the future to support other volume backends.

Change-Id: I59eb05227b264dba164161e9d14502ba2af0f5c2
Merge "Expose nova security_group_api parameter"
Merge "Removes un-needed cinder parameter"
Merge "Allow Controller to manage volumes"