cannot dump job description from exported recipe run data file

[jtluka]

Running following script fails with an exception.

#!/usr/bin/python3

from lnst.Controller.Recipe import import_recipe_run

f = import_recipe_run('./lnst-run-data-0.lrc')

for r in f.results:
    print(type(r))
    print(r.__dict__)
    try:
        print(r._job.__dict__)
    except:
        pass
    print(r.description)

<class 'lnst.Controller.RecipeResults.JobStartResult'>
{'_timestamp': 1623850365.611658, '_success': True, '_job': <lnst.Controller.Job.Job object at 0x7f51ab8f9c50>}
{'_what': 'ip -4 route add 192.168.7.0/24 dev t_vxlan0', '_expect': True, '_json': False, '_netns': None, '_desc': None, '_level': <ResultLevel.IMPORTANT: 1>, '_res': {'passed': True, 'res_data': {'stdout': '', 'stderr': ''}, 'type': 'result'}, '_id': 0}
Traceback (most recent call last):
  File "./read.py", line 14, in <module>
    print(r.description)
  File "/usr/lib/python3.6/site-packages/lnst-14_-py3.6.egg/lnst/Controller/RecipeResults.py", line 85, in description
    return "Job started: {}".format(str(self.job))
  File "/usr/lib/python3.6/site-packages/lnst-14_-py3.6.egg/lnst/Controller/Job.py", line 222, in __str__
    attrs.append("host(%s)" % self.host.hostid)
  File "/usr/lib/python3.6/site-packages/lnst-14_-py3.6.egg/lnst/Controller/Job.py", line 80, in host
    return self._netns.initns
AttributeError: 'NoneType' object has no attribute 'initns'

[jtluka]

Seems the netns is reset in this method when pickling the RecipeRun object.