During testing, logging errors are generated: "ValueError: I/O operation on closed file"

[donaldcampbelljr]

This appears to be happening in all branches for me. Currently running PyTests and the terminal outputs many of these logging errors making it difficult to read testing results.

--- Logging error ---
Traceback (most recent call last):
  File "/home/drc/anaconda3/envs/condalooper_p38/lib/python3.8/logging/__init__.py", line 1088, in emit
    stream.write(msg + self.terminator)
ValueError: I/O operation on closed file.
Call stack:
  File "/home/drc/GITHUB/pypiper/pypiper/pypiper/manager.py", line 1799, in _exit_handler
    self.fail_pipeline(Exception("Pipeline failure. See details above."))
  File "/home/drc/GITHUB/pypiper/pypiper/pypiper/manager.py", line 1651, in fail_pipeline
    self.timestamp("### Pipeline failed at: ")
  File "/home/drc/GITHUB/pypiper/pypiper/pypiper/manager.py", line 1215, in timestamp
    self.info(msg)
  File "/home/drc/GITHUB/pypiper/pypiper/pypiper/manager.py", line 1134, in info
    self._logger.info(msg, *args, **kwargs)
Message: '\n### Pipeline failed at:  (06-13 16:17:19) elapsed: 0.0 _TIME_\n'
Arguments: ()