haproxy: ocp cluster is only in iad2
    
    If we push this to all proxies (as we have), they will fail to start
    haproxy because they cannot resolve the internal ocp iad2 hosts. ;(
    
    The ocp clusters should only apply on the iad2 haproxy nodes, not all
    proxies. Also fix logic on the staging one to apply in staging instead
    of just production.
    
    Signed-off-by: Kevin Fenzi <kevin@scrye.com>