Fix handling of timeout cases in _arakoon_networking_poll_act
Fix handling of timeout cases in _arakoon_networking_poll_act

In some somewhat-happy-path cases, a given timeout could be reached,
yet the poll-loop would continue running, even passing a negative value
to poll(2) (which would result in an infinite timeout of the call).

This commit adds a check which makes sure the procedure returns in
time.

Change-Id: I667b85598dea103656462fb7d63513639c7695e2
See: ARAKOON-324
See: http://jira.incubaid.com/browse/ARAKOON-324

Incubaid/crakoon,Incubaid/crakoon,Incubaid/crakoon,Incubaid/crakoon