Merge pull request #552 from rackerjoe/master

revert memcached update
Auto Updating openssl submodule
Auto Updating erlang submodule
Auto Updating postgresql submodule
Auto Updating mysql submodule
Auto Updating memcached submodule
Auto Updating nova submodule
Auto Updating glance submodule
Auto Updating dsh submodule
Auto Updating nova submodule
Auto Updating nova-network submodule
Auto Updating horizon submodule
revert memcached cookbook to one that is not broken upstream for RHEL/CentOS