Extend cinder::setup_test_volume to use cinder provided path

cinder::setup_test_volume should now support RHEL6 and RHEL7 and
also Fedora systems. It should use cinder provided path and not
file in /tmp and it should set correct permissions to it.

Change-Id: Iee783a3445c97b6559d63d0d501b12028b7b2b26
Merge "Extend cinder::setup_test_volume to use cinder provided path"