OSError: [Errno 2] No such file or directory: , let's reduce its probability

[fgeorgatos]

i believe that this occurs when 2 instances of qtop run in same system, under same user, which hints towards a race due to filename collission; which invites for asking if it can be randomized a bit better!

Log file created in /home/fgeorgatos/.local/qtop/logs/qtop.log
Traceback (most recent call last):
  File "/home/fgeorgatos/qtop/qtop.py", line 1775, in <module>
    fileutils.deprecate_old_output_files(config)
  File "/home/fgeorgatos/qtop/qtop_py/fileutils.py", line 83, in deprecate_old_output_files
    file_modified = datetime.datetime.fromtimestamp(os.path.getmtime(curpath))
  File "/usr/lib64/python2.6/genericpath.py", line 54, in getmtime
    return os.stat(filename).st_mtime
OSError: [Errno 2] No such file or directory: '/tmp/qtop_results_fgeorgatos/qtop_partview_20180311T140756_dHitcN.out'