Merge changes from topic "pylint-issues"

* changes:
  use dict instead of many elif in functional tests
  convert test_topoPortmapping.py to snake case
  remove dead code from topology221 test
  fix some pylint issues
  fix superflous parenthesis pointed out by pylint
  fix functional tests linelength pylint issues
  fix few bugs and unused issues in functional tests
  fix pylint configuration
  run autopep8 on functional tests