tests: force rpm pkg upgrade

Due to a bug with the rpm version present in the current stream8 vagrant image,
we have to make sure it is first upgraded to the latest version.

Signed-off-by: Guillaume Abrioux <gabrioux@ibm.com>
(cherry picked from commit b87f214a96)

tests/functional/setup.yml

@@ -13,6 +13,12 @@
       set_fact:
         is_atomic: '{{ stat_ostree.stat.exists }}'
 
+    - name: force rpm pkg upgrade
+      package:
+        name: rpm
+        state: latest
+      when: not is_atomic | bool
+
     - name: update the system
       command: dnf update -y
       changed_when: false