MultiServerConnectionFactory does not use the provided initialConnection for the first call

[ScottDugas]

Building on the work here: #3083
I tried to change MultiServerConnectionFactoryTest so that it returns a mock statement, and assert about the statements that it returns, rather than asserting about the counters being used.

When I did this I added an assertion that the first statement comes from the initialConnection, and that failed.
I think it ends up incrementing weirdly.
I tried to get it to work, but kept failing.

Also, of note, the alternating may be confusing in the case where you have a variety of different calls to continuations.