Drop drv_cfg from rootwrap filters
Drop drv_cfg from rootwrap filters

Drop "drv_cfg" from rootwrap filters its not being used
anywhere.

Change-Id: I10d58665d12565036d6a0dbb90743903071b3bd7
Signed-off-by: Chuck Short <61c7e57c8f71fbf1f6c3fcd85c16ccd0f494e116@redhat.com>

mahak/cinder,mahak/cinder,openstack/cinder,openstack/cinder