…fim/test_files documentation in QA Docs style

The following tests have been documentated:
  * test_scan_day.py
  * test_scan_day_and_time.py
  * test_scan_time.py
The current scheme of the issue #1694 has been used.
PEP-8 fixes.

Closes: #2031

…fim/test_files documentation in QA Docs style

The following tests have been documentated:
  * test_skip.py
  * test_FIM_performance.py
  * test_stats_integrity_sync.py
The current scheme of the issue #1694 has been used.
Updated config.yaml
PEP-8 fixes.

Closes: #2031