Placement does not use global CONF object. However when the policy
upgrade check was added in Ia7365cc3ae09e2ff916ab9f9ff0ba4fef0dc446b it
was referred to the global CONF object. However in placement it is not
initialized. Therefore the $ placement-status upgrade check fails with
This patch makes sure that the policy upgrade check uses an initialized
config object instead.
(cherry picked from commit 992dd6a70679eb82cb47b734db2528fc747cb99d)