Appease the race detector

Some of the code under test uses go routines and the race checker wasn't
too happy when the fakes used by the code under test read data that was
set during BeforeEach (processes, containerProperties).

There's also an issue with changing what a counterfeiter stub returns
while the test is running. Even though the fake method synchronizes the
get, there's no synchronization on the XXXReturns setup method.  This
caused race conditions when changing what Wait returned.