TypeError when use logging.LogRecord

[uchenily]

I found EypeError in oslo.privsep:

Traceback (most recent call last):
  File "/usr/lib/python3.6/threading.py", line 916, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.6/threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/lib/python3.6/dist-packages/oslo_privsep/comm.py", line 131, in _reader_main
    self.out_of_band(data)
  File "/usr/local/lib/python3.6/dist-packages/oslo_privsep/daemon.py", line 210, in out_of_band
    if LOG.isEnabledFor(record.levelno):
  File "/usr/lib/python3.6/logging/__init__.py", line 1680, in isEnabledFor
    if self.logger.manager.disable >= level:
TypeError: '>=' not supported between instances of 'int' and 'NoneType'

environment info:
python: 3.6.7
oslo.privsep: 1.29.2

this simple bug causes nova-compute to not work properly. [1]is a related bug.

if it's ok, I will fix it later.

[1] https://bugs.launchpad.net/oslo.privsep/+bug/1696772

[uchenily (uchenily)]

https://github.com/openstack/oslo.privsep/blob/1.29.2/oslo_privsep/daemon.py#L210

I think here we can use:
```
if record.levelno and LOG.isEnabledFor(record.levelno):
```
because record.levelno maybe NoneType

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/716873

[OpenStack Infra (hudson-openstack)]

Change abandoned by "Daniel Bengtsson <email address hidden>" on branch: master
Review: https://review.opendev.org/c/openstack/oslo.privsep/+/716873
Reason: No update for a long time.