follow_logs may raise UnicodeDecodeError

[fabricebrito]

follow_logs may raise an UnicodeDecodeError when the pod logs something not utf-8:

�[1;30mDEBUG�[0m �[32mrestore [ram: 32000, cores: 6] to available [ram: 0.0, cores: 0.0]�[0m
�[1;30mDEBUG�[0m �[32m[workflow ] job step file:///workflow-input/..2022_09_12_13_27_45.427694849/workflow.cwl#main/node_stage_out not ready�[0m
�[1;30mDEBUG�[0m �[32m[workflow on_stage] job step file:///workflow-input/..2022_09_12_13_27_45.427694849/workflow.cwl#dlr-insar-browse/node_stac not ready�[0m
�[1;30mDEBUG�[0m �[32mwait_for_completion with 0 futures�[0m
�[1;30mERROR�[0m �[31mFound a queued exception, canceling outstanding futures�[0m
�[1;30mERROR�[0m �[31mWaiting for canceled futures to finish�[0m
�[1;30mERROR�[0m �[31mGot workflow error�[0m
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/calrissian/executor.py", line 256, in raise_if_exception_queued
    raise exceptions[0]
  File "/usr/local/lib/python3.7/concurrent/futures/thread.py", line 57, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/local/lib/python3.7/site-packages/calrissian/job.py", line 652, in run
    completion_result = self.wait_for_kubernetes_pod()
  File "/usr/local/lib/python3.7/site-packages/calrissian/job.py", line 392, in wait_for_kubernetes_pod
    return self.client.wait_for_completion()
  File "/usr/local/lib/python3.7/site-packages/tenacity/__init__.py", line 292, in wrapped_f
    return self.call(f, *args, **kw)
  File "/usr/local/lib/python3.7/site-packages/tenacity/__init__.py", line 358, in call
    do = self.iter(retry_state=retry_state)
  File "/usr/local/lib/python3.7/site-packages/tenacity/__init__.py", line 319, in iter
    return fut.result()
  File "/usr/local/lib/python3.7/concurrent/futures/_base.py", line 428, in result
    return self.__get_result()
  File "/usr/local/lib/python3.7/concurrent/futures/_base.py", line 384, in __get_result
    raise self._exception
  File "/usr/local/lib/python3.7/site-packages/tenacity/__init__.py", line 361, in call
    result = fn(*args, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/calrissian/k8s.py", line 156, in wait_for_completion
    self.follow_logs() # This will not return until pod completes
  File "/usr/local/lib/python3.7/site-packages/tenacity/__init__.py", line 292, in wrapped_f
    return self.call(f, *args, **kw)
  File "/usr/local/lib/python3.7/site-packages/tenacity/__init__.py", line 358, in call
    do = self.iter(retry_state=retry_state)
  File "/usr/local/lib/python3.7/site-packages/tenacity/__init__.py", line 319, in iter
    return fut.result()
  File "/usr/local/lib/python3.7/concurrent/futures/_base.py", line 428, in result
    return self.__get_result()
  File "/usr/local/lib/python3.7/concurrent/futures/_base.py", line 384, in __get_result
    raise self._exception
  File "/usr/local/lib/python3.7/site-packages/tenacity/__init__.py", line 361, in call
    result = fn(*args, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/calrissian/k8s.py", line 140, in follow_logs
    line = line.decode('utf-8').rstrip()
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb0 in position 64: invalid start byte
�[1;30mERROR�[0m �[31mWorkflow error:
'utf-8' codec can't decode byte 0xb0 in position 64: invalid start byte�[0m

[emmanuelmathot]

fixed in #137