Add IRC bot on #openstack-quantum for Gerrit changes

Change-Id: I652d78d53642a91737cf18b7551d5132d10a0ccf
Reviewed-on: https://review.openstack.org/23744
Reviewed-by: dan wendlandt <dan@nicira.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Approved: Clark Boylan <clark.boylan@gmail.com>
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Tested-by: Jenkins