ironic-python-agent/ironic_python_agent at a01646f56b3074df0756af4147fa8c5f5735681a - ironic-python-agent - OpenDev: Free Software Needs Free Tools

Heartbeating in IPA has used select.poll() for years to workaround
a bug where changing the time in the ramdisk could cause heartbeats
to stop and never resume.
Now that IPA syncs time at start and exit, this workaround is no
longer needed. So instead, we'll revert to using threading.Event()
in order to make the code simpler and easier to understand.
Since we need this to be an eventlet-event, and not a standard-thread
event, also monkey_patch threading.
Additionally, there were a few completely unused backoff interval
values set, that were never applied. In respect of maintaining the
5+ years old behavior of not doing error backoffs, that code was
removed instead of being made to work.
Change-Id: Ibcde99de64bb7e95d5df63a42a4ca4999f0c4c9b