This is another attempt at getting the useless tracebacks out of logs
for any level higher than debug. In particular:
* All pools logs regarding "Kuryr-controller not yet ready to *" are now
on debug level.
* The ugly ResourceNotReady raised from _populate_pool is now suppressed
if method is run from eventlet.spawn(), which prevents that exception
being logged by eventlet.
* ResourceNotReady will only print namespace/name or name, not the full
resource representation.
* ConnectionResetError is suppressed on Retry handler level just as any
other K8sClientError.
Change-Id: Ic6e6ee556f36ef4fe3429e8e1e4a2ddc7e8251dc
9743f6b3c9