message: integration_tests: fix test without camera
  I had switched that while editing by accident.
diff: #include "mavsdk.h"
  #include "plugins/telemetry/telemetry.h"
  -#define CAMERA_AVAILABLE 1 // Set to 1 if camera is available and should be tested.
  +#define CAMERA_AVAILABLE 0 // Set to 1 if camera is available and should be tested.
  using namespace mavsdk;
  