Yet another supersede: should have checked the test flavor with osc build -M test --clean

- Fix building and installation of exampleprojects for testing

- Update to 5.6.1
* Fixed #1546: Unstable (non-idempotent) behavior with certain
src trees.
- Changelog for 5.6.0
* Implemented #1433: Provide helpful feedback in case a custom
config file is specified without a configuration.
* Implemented #1494: Default to sorting imports within .pxd
files.
* Implemented #1502: Improved float-to-top behavior when there
is an existing import section present at top-of-file.
* Implemented #1511: Support for easily seeing all files isort
will be ran against using isort . --show-files.
* Implemented #1487: Improved handling of encoding errors.
* Improved handling of unsupported configuration option errors
(see #1475).
* Fixed #1463: Better interactive documentation for future
option.
* Fixed #1461: Quiet config option not respected by file API in
some circumstances.
* Fixed #1482: pylama integration is not working correctly out-
of-the-box.
* Fixed #1492: --check does not work with stdin source.
* Fixed #1499: isort gets confused by single line, multi-line
style comments when using float-to-top.
* Fixed #1525: Some warnings can't be disabled with --quiet.
* Fixed #1523: in rare cases isort can ignore direct from import
if as import is also on same line.
+ Potentially breaking changes: