Always check if we have a remote credential
    
    Even if we are not given an explicit ccache, check if the ccache we are
    going to use for operations on the client side has a stored remote
    credential. If one is found use it.
    
    Signed-off-by: Simo Sorce <simo@redhat.com>
    Reviewed-by: Robbie Harwood <rharwood@redhat.com>
    PR: #51