Fix container-to-capsule sync test (SatelliteQE#11262)

It seems we need a little sleep when running on OSP.
This was already fixed in 6.12.z, but not in master.

tests/foreman/api/test_capsulecontent.py

@@ -19,6 +19,7 @@
 """
 import re
 from datetime import datetime
+from time import sleep
 
 import pytest
 from nailgun import client
@@ -1002,6 +1003,8 @@ def test_positive_sync_container_repo_end_to_end(
                 id=function_lce.id, registry_unauthenticated_pull='true'
             ).update(['registry_unauthenticated_pull'])
 
+            sleep(20)
+
             skopeo_cmd = 'skopeo --debug inspect docker://'
             for path in repo_paths:
                 result = module_capsule_configured.execute(