Add testcases()TestSameElectionIDFromTwoClients and TestElectionIdAsZero) in compliance test

[mingyangcisco]

We are adding 2 testcases (TestSameElectionIDFromTwoClients and TestElectionIdAsZero) in compliance test.
TestSameElectionIDFromTwoClients is the test that same the same election Id from 2 clients and 1st client will be master and 2nd will be non-master
TestElectionIdAsZero is the test that client sends (0,0) as the election Id to the server. the server should respond with RPC error invalid argument based on the protobuf.

Following is the testing log for those 2 testcases.

=== RUN   TestCompliance/Decrementing_election_ID_is_ignored
E0107 17:23:25.048685   76747 client.go:308] got error receiving message, rpc error: code = Canceled desc = grpc: the client connection is closing
E0107 17:23:25.048804   76747 server.go:265] received nil message on Modify channel
=== RUN   TestCompliance/Sending_same_election_ID_from_two_clients
E0107 17:23:25.258343   76747 client.go:308] got error receiving message, rpc error: code = Unavailable desc = transport is closing
E0107 17:23:25.258442   76747 server.go:265] received nil message on Modify channel
E0107 17:23:25.271405   76747 server.go:843] returning failed to client afe3a997-b3aa-429d-bfeb-91095d1f1e06 (id: low:52), because they are not the elected master (fb91be92-4a85-40e2-a41f-624eccbfca1c is, id: low:52)
=== RUN   TestCompliance/Sending_election_ID_as_zero
E0107 17:23:25.373305   76747 client.go:308] got error receiving message, rpc error: code = Canceled desc = grpc: the client connection is closing
E0107 17:23:25.373427   76747 client.go:308] got error receiving message, rpc error: code = Unavailable desc = transport is closing
E0107 17:23:25.373498   76747 server.go:265] received nil message on Modify channel
E0107 17:23:25.373532   76747 server.go:265] received nil message on Modify channel
E0107 17:23:25.380454   76747 client.go:308] got error receiving message, rpc error: code = InvalidArgument desc = client ID 0478263c-517a-4c14-b4e6-29f7fbf0e106, zero is an invalid election ID
    --- PASS: TestCompliance/Sending_same_election_ID_from_two_clients (0.11s)
    --- PASS: TestCompliance/Sending_election_ID_as_zero (0.11s)

[robshakir]

Thanks for this change! Looks correct to me.

It's likely that we shouldn't be running the -race tests against the compliance tests, let me verify and update the workflow.