Nightly tests: fix template for nightly_ipa-4-10_latest.yaml
    
    The vagrant box must be freeipa/ci-ipa-4-10-f36 on this branch
    instead of freeipa/ci-master-f36.
    
    Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Armando Neto <abiagion@redhat.com>