cman init: fix start sequence error handling
    
    Any daemon that fails to start would leave no traces.
    
    the problem with cman init is that we need to handle multiple daemons
    and tools. If one in the chain fails, we never reverted to the original
    state of the system. This can indeed cause other issues.
    
    Fix the init script to "stop" cman if any error happens during "start.
    
    Resolves: rhbz#806002
    
    Reviewed-by: Christine Caulfield <ccaulfie@redhat.com>
    Signed-off-by: Fabio M. Di Nitto <fdinitto@redhat.com>