remove some logging statements
we shouldn't be returning error if the function takes a response channel

This is causing a bunch of deadlocks since those functions gets called
in a goroutine and their return values are never checked. Instead we
should return an endStreamResponse with the error message.
fix a bug, use value comparison instead of pointer comparison
change the name of the series in the test
fix a compilation error
more logging
sleep for a few seconds to give a chance for raft to replay the log