tests: temporarily pin Candlepin to 4.4.2

The current latest release (4.4.3) introduces a regression that breaks
the support for environments in subscription-manager. Since:
- we are not testing subscription-manager here, rather the rhc role
- the issue is already known by the Candlepin developers, and hopefully
  to be fixed in the next version
hence pin the Candlepin container to the latest version before the
regression, i.e. 4.4.2. This way, we can keep testing changes in the rhc
role.

Signed-off-by: Pino Toscano <[email protected]>

tests/tasks/setup_candlepin.yml

@@ -41,7 +41,7 @@
       containers.podman.podman_container:
         detach: true
         hostname: "{{ lsr_rhc_test_data.candlepin_host }}"
-        image: ghcr.io/ptoscano/candlepin-unofficial
+        image: ghcr.io/ptoscano/candlepin-unofficial:4.4.2-1
         name: candlepin
         privileged: "{{ ansible_distribution in ['CentOS', 'RedHat']
           and ansible_distribution_major_version | int < 8 }}"