get_nodes/openstack: add config_drive set to true by default

(cherry picked from commit 539b1bf6a19e9c6f6d7377d44362243afd2416e1)

Conflicts:
	roles/get_nodes/openstack/tasks/main.yml

Change-Id: I76df80394cc91cb814f547a7df4c7524f2854647
Moves older version of fedora-prep script to icehouse directory

Post icehouse, selinux is no longer set to permissive.

Change-Id: I50a83cad929275353fcd6ed1eb418d9a4e137079
(cherry picked from commit a48f6bad46776f15205198b7e9c45dbd0c49a41d)