This change adds the missing region setting in service_credentials. In a
shared keystone multi region setup, this setting is mandatory in order
for ceilometer to properly find the services it relies upon from the
same region it resides in. Without this setting, the ceilometer-upgrade
action will fail (along with any other calls made to ceilometer) if the
first endpoint returned by keystone is from a different region.
Change-Id: Ie14df0f5fc7ee18072091dbdb3ada817615a6670
Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>