message: Add Nice mock to avoid GmockWarnings
diff: #include "application_manager/test/include/application_manager/mock_hmi_interface.h"
  #include "application_manager/test/include/application_manager/mock_application.h"
  #include "application_manager/test/include/application_manager/mock_message_helper.h"
  +#include "application_manager/mock_application_manager_settings.h"
  #include "application_manager/mock_rpc_service.h"
  #include "application_manager/mock_hmi_capabilities.h"
  #include "application_manager/policies/mock_policy_handler_interface.h"
  @@ -149,8 +150,10 @@ class CommandsTest : public ::testing::Test {
  MockAppManager app_mngr_;
  MockRPCService mock_rpc_service_;
  - application_manager_test::MockHMICapabilities mock_hmi_capabilities_;
  - policy_test::MockPolicyHandlerInterface mock_policy_handler_;
  + testing::NiceMock<application_manager_test::MockHMICapabilities>
  + mock_hmi_capabilities_;
  + testing::NiceMock<policy_test::MockPolicyHandlerInterface>
  + mock_policy_handler_;
  MockAppManagerSettings app_mngr_settings_;
  MOCK(am::MockHmiInterfaces) mock_hmi_interfaces_;
  am::MockMessageHelper& mock_message_helper_;
  