automount: do not inherit automountlocation_import from LDAPQuery
    
    automountlocation_import is a client-side command which does not use LDAP
    directly. Inherit it from Command rather than LDAPQuery and copy its
    arguments from automountlocation_show.
    
    This will make it possible to move automountlocation_import to ipaclient.
    
    https://fedorahosted.org/freeipa/ticket/4739
    
    Reviewed-By: David Kupka <dkupka@redhat.com>