Adding the list for OpenStack discussions in Spanish

Change-Id: I8208bba0dfaad67ae9050b1939064a4fd5686967
Reviewed-on: https://review.openstack.org/30495
Reviewed-by: David Ripton <dripton@redhat.com>
Reviewed-by: Stefano Maffulli <stefano@openstack.org>
Reviewed-by: Tom Fifield <fifieldt@unimelb.edu.au>
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Approved: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins