A change to the global-requirements has limited use of monotonic
library to Python versions earlier than 3.3 (later versions have
built-in support for a monotonic clock), so limit it in
requirements.txt.
Note: this patch updates kafka driver (due to deprecated exception
in library) in order to pass unit tests
Change-Id: Id6b0814e05a0e548a8c2a5359daf1a6878cf6859