worker_server1.release();
  worker_server0.release();
}

// This test verifies the following:
// 1. Start the GRPC servers for both worker 0 and 1 using the full cluster
//    server def A.
// 2. Create a context B using the full cluster server def A.
// 3. Create the variable in B.
// 4. Create a context C using a single host server def D with only worker 1.
// 5. Read the variable in C.