unstable test in the TestGRPC

[hawkingrei]

Bug Report

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1. Minimal reproduce step (Required)

2. What did you expect to see? (Required)

3. What did you see instead (Required)

    logger.go:130: 2023-05-04T13:14:45.877+0800 INFO    grpc    [[core] [Channel #10] Channel switches to new LB policy "pick_first"]
    logger.go:130: 2023-05-04T13:14:45.877+0800 INFO    grpc    [[core] [Channel #10 SubChannel #12] Subchannel created]
    logger.go:130: 2023-05-04T13:14:45.877+0800 INFO    grpc    [[core] [Channel #10] Channel Connectivity change to CONNECTING]
    logger.go:130: 2023-05-04T13:14:45.877+0800 INFO    grpc    [[core] [Channel #10 SubChannel #12] Subchannel Connectivity change to CONNECTING]
    logger.go:130: 2023-05-04T13:14:45.877+0800 INFO    grpc    [[core] [Channel #10 SubChannel #12] Subchannel picks a new address "127.0.0.1:10080" to connect]
    logger.go:130: 2023-05-04T13:14:45.877+0800 INFO    grpc    [[core] pickfirstBalancer: UpdateSubConnState: 0xc018a3ddb8, {CONNECTING <nil>}]
    logger.go:130: 2023-05-04T13:14:45.878+0800 INFO    grpc    [[core] [Channel #10 SubChannel #12] Subchannel Connectivity change to READY]
    logger.go:130: 2023-05-04T13:14:45.878+0800 INFO    grpc    [[core] pickfirstBalancer: UpdateSubConnState: 0xc018a3ddb8, {READY <nil>}]
    logger.go:130: 2023-05-04T13:14:45.878+0800 INFO    grpc    [[core] [Channel #10] Channel Connectivity change to READY]
    autoid_test.go:201:
                Error Trace:    autoid_service/autoid_test.go:201
                Error:          Received unexpected error:
                                rpc error: code = Unimplemented desc = unknown service autoid.AutoIDAlloc
                Test:           TestGRPC

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