anchor.diff:  
   
   start_meck() ->
  -    MeckModules = [watts_service, ssh, ssh_connection],
  +    MeckModules = [watts_service, ssh, ssh_connection, exec],
       ok = test_util:meck_new(MeckModules),
       ?SETCONFIG( vsn, "eunit"),
       SShCmd = <<"create credential">>,
  
positive.code:         ConfigRev = maps:merge(ConfigReq, #{action => revoke,
                                              cred_state => <<"credstate">>}),
          {error, bad_json_result
          , _} = watts_plugin_runner:request_action(ConfigRev, RevPid),
          ok = test_util:wait_for_process_to_die(RevPid,100)
      after
  
negative.code:                       user_info => UserInfo,
                        params => Params,
                        queue => undefined},
  
          {error, bad_json_result
          , _} = watts_plugin_runner:request_action(ConfigReq, ReqPid),
          ok = test_util:wait_for_process_to_die(ReqPid,100),
  