Let zake act as a in-memory fully functional driver

The zake driver should theoretically function the same as the
non-local driver so all the same kazoo functions should work,
without the whole distributed part as they work with the regular
zookeeper backed kazoo driver.

Change-Id: I19df0da0e58c5624ca1b10f61c42510f1f104847
Merge "Let zake act as a in-memory fully functional driver"