Remove usage of parameter enforce_type
Remove usage of parameter enforce_type

Oslo.config deprecated parameter enforce_type and change its default
value to True in Ifa552de0a994e40388cbc9f7dbaa55700ca276b0. Remove the
usage of it to avoid DeprecationWarning: "Using the 'enforce_type'
argument is deprecated in version '4.0' and will be removed in version
'5.0': The argument enforce_type has changed its default value to True
and then will be removed completely."

Change-Id: I10d550c5346e0935ee1ae3981d6ba41167577e20

openstack/vitrage,openstack/vitrage,openstack/vitrage