We need to completely remove the mocks for oslo.service private members
in order to decouple nova from the requirements updates and be able to
update the constraint for oslo.service to a new version that has a
fixture for managing the sleep call being mocked (applied in the
following patch).
Change-Id: I0bbd2d7f9d6eb13d97587d867ef4d651809a7dd4
Signed-off-by: Doug Hellmann <doug@doughellmann.com>