Merge branch 'SLE-15-SP2' into sync-SLE-15-SP2

* SLE-15-SP2:
  Update from code review
  Bump version and update changes file
  Add a missing test
  Drop unused code
  More clean-ups
  Move calls to Yast.import outside the class
  Add a "filename" option to the clone_system client
  Improve clone_system client coding style
  Add a Y2ModuleConfig.clonable_modules method
  Extend Y2ModuleConfig tests
  Move clone_system client to lib directory
  Add a list-modules command to autoyast client
  Fix autoyast client command line id
  Fix autoyast_test to not fail with 'osc build'
  CLI: Merge 'file' and 'module' actions
  Move the AutoSequence wizard to a separate class
  Improve autoyast client coding style
  Move autoyast client to lib directory