Config requires to use oslo.cache lib to cache keystone token
Config requires to use oslo.cache lib to cache keystone token

Use a keytonemiddleware version (>= 5.0.0) which uses oslo.cache library to
cache token in memcached. This permits to resolve connections leaking to the
memcached server with python 2 and gevent greenthreading.

Change-Id: I02598ab48fc618d1ba87fac00381ee0a7e98ab99
Closes-Jira-Bug: CEM-7497

Juniper/contrail-packages,Juniper/contrail-packages