ConnectionsState.testsOnly_setInternalState needs to go

[weissi]

ConnectionsState.testsOnly_setInternalState makes all tests that use this a lot less useful. The reason is that the state it sets may not ever be reachable in the real world.

We need to remove this function and enter each state by a series of transitions instead of just jumping to a state that may or may not be valid.

[artemredkin]

Was fixed by #311