MB-47591: Fix ns_config_default:all_upgrades_test_ unit test

Change-Id: I0b7fe46f98e5ab720e715d40a55ce7fad85fbcf7
Reviewed-on: https://review.couchbase.org/c/ns_server/+/174559
Well-Formed: Restriction Checker
Well-Formed: Build Bot <[email protected]>
Tested-by: Build Bot <[email protected]>
Tested-by: Timofey Barmin <[email protected]>
Reviewed-by: Abhijeeth Nuthan <[email protected]>

Author: timofey-barmin

src/ns_config_default.erl

@@ -502,8 +502,14 @@ no_upgrade_on_current_version_test() ->
 
 all_upgrades_test_() ->
     {setup,
-     fun ns_config:mock_tombstone_agent/0,
+     fun () ->
+             ns_config:mock_tombstone_agent(),
+             meck:new(sigar),
+             meck:expect(sigar, get_cgroups_info,
+                         fun () ->  #{supported => false} end)
+     end,
      fun (_) ->
+             meck:unload(sigar),
              ns_config:unmock_tombstone_agent()
      end,
      ?_test(test_all_upgrades())}.