Merge branch 'hotfix/up_test_coverage' into develop

* hotfix/up_test_coverage:
  up coverage
  up coverage
  up coverage in place decorator
Merge branch 'hotfix/remove_helpers' into develop

* hotfix/remove_helpers:
  remove unsing dirs
  remove unusing files
add date validator
Merge branch 'develop'

* develop:
  add date validator