When using group of group, the playbook will apply undesired
labels on nodes.
This commit fixes it by applying only the expected labels.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=2057528

Signed-off-by: Guillaume Abrioux <[email protected]>
(cherry picked from commit 266b6e739c26a931f1c975a990f22906223015ef)
(cherry picked from commit bcab0d7a5571ec3195e79e0b776343f3dda70ec0)