The AsyncOpTimeoutWithOpCtxDeadlineSooner unit test (code) runs a command and expects to get a timeout error while waiting for a response from the mongod server. When the test runs the baton version test suit, the `waitForHello` function will block the baton to execute tasks as it does not wait on anything until `waitForHello` return. Similar issue exists on other baton version test cases which call `waitForHello` function in this file.

In this ticket, we will make the baton version `waitForHello` to run baton while waiting for the hello response.