Update /etc/cinder/cinder.conf.sample for memcache
Update /etc/cinder/cinder.conf.sample for memcache

It appears that an update to keystone middleware earlier today
added options for memcache_secret_key, memcache_pool_dead_retry,
memcache_pool_maxsize, memcache_pool_socket_timeout,
memcache_pool_unused_timeout, memcache_pool_conn_get_timeout and
memcache_use_advanced_pool.  The commit that added these options
was: a7beb50b38be5c3dd4c44d68ad79d1bb206dab6b - "Add an optional
advanced pool of memcached clients".

This has once again caused the check_uptodate.sh script to fail.

This patch updates cinder.sample.conf .

Change-Id: Ibcf19ccc81a56a9a3e795022e3e07bc061fa9401
Closes-bug: 1374154

potsmaster/cinder,phenoxim/cinder,takeshineshiro/cinder,rakeshmi/cinder,scality/cinder,ge0rgi/cinder,eharney/cinder,mahak/cinder,Akrog/cinder,Akrog/cinder,hguemar/cinder,hguemar/cinder,abusse/cinder,tlakshman26/cinder-https-changes,NetApp/cinder,CloudServer/cinder,Datera/cinder,Hybrid-Cloud/cinder,tlakshman26/cinder-new-branch,Nexenta/cinder,blueboxgroup/cinder,rakeshmi/cinder,leilihh/cinder,saeki-masaki/cinder,tlakshman26/cinder-bug-fix-volume-conversion-full,NetApp/cinder,cloudbase/cinder,scality/cinder,manojhirway/ExistingImagesOnNFS,winndows/cinder,julianwang/cinder,Accelerite/cinder,duhzecca/cinder,leilihh/cinder,openstack/cinder,scottdangelo/RemoveVolumeMangerLocks,j-griffith/cinder,petrutlucian94/cinder,sasukeh/cinder,phenoxim/cinder,scottdangelo/RemoveVolumeMangerLocks,petrutlucian94/cinder,tlakshman26/cinder-https-changes,alex8866/cinder,JioCloud/cinder,apporc/cinder,takeshineshiro/cinder,j-griffith/cinder,tlakshman26/cinder-bug-fix-volume-conversion-full,Accelerite/cinder,sasukeh/cinder,saeki-masaki/cinder,potsmaster/cinder,duhzecca/cinder,eharney/cinder,bswartz/cinder,Hybrid-Cloud/cinder,bswartz/cinder,nikesh-mahalka/cinder,winndows/cinder,dims/cinder,JioCloud/cinder,redhat-openstack/cinder,dims/cinder,tlakshman26/cinder-new-branch,redhat-openstack/cinder,mahak/cinder,nikesh-mahalka/cinder,abusse/cinder,nexusriot/cinder,Datera/cinder,Paul-Ezell/cinder-1,nexusriot/cinder,CloudServer/cinder,alex8866/cinder,Paul-Ezell/cinder-1,openstack/cinder,julianwang/cinder,Nexenta/cinder,manojhirway/ExistingImagesOnNFS,blueboxgroup/cinder,cloudbase/cinder,apporc/cinder