Nearest neighbor finder training module

Pull request #12: Master

Merge in EOSC-RS/nearest-neighbor-finder-training-module from master to dev

* commit '91795198d2a2ba92a52e77d712a226ddd21f9709':
  code style improvements
  test coverage update - omit exceptions
  test tweaks
  test update
  tests update: - test async functions (added pytest-async) - changed README test steps - omit unneeded files in pytest config files
  docs update
  docs update
  Jenkinsfile changes