infra playbook: move untested scenario to a new dir

Move untested/with few confidence playbooks in a untested-by-ci
directory.
Also removing this directory from the package build.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1461551
Signed-off-by: Sébastien Han <seb@redhat.com>

ceph-ansible.spec.in

@@ -42,6 +42,7 @@ done
 pushd %{buildroot}%{_datarootdir}/ceph-ansible
   rm -r roles/ceph-common-coreos
   rm group_vars/common-coreoss.yml.sample
+  rm -r infrastructure-playbooks/untested-by-ci
 popd
 
 # Strip iscsi files.