Update ipa-replica-install replication agreement error message
    
    So that it prints out a valid command:
    - replace "ipa-replica-manage del" by "ipa server-del" (only domain-level1 is now supported)
    - the commands needs to be run on a working server, not on the host where ipa-replica-install failed
    
    Fixes: https://pagure.io/freeipa/issue/9162
    Reviewed-By: Michal Polovka <mpolovka@redhat.com>