Fix return parameter value and name of sanlockConfigModule is-configured

1. Fixing the return value to the right expected boolean.
2. Changing ret to configured for more readability of the code.

Change-Id: Iee05a07727a99adae2eab619eada1a42c0ad5f73
Signed-off-by: Yaniv Bronhaim <ybronhei@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/22496
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Tested-by: Dan Kenigsberg <danken@redhat.com>