Fix issue #45, outdated test environment setup and Mockup ctrl. HW limits calc
Fix issue #45 (closed): update _set_position when HW limits are hit:
- In motor Group, break asymmetry between start & stop when multi-axes controller commands are not supported
- Fix outdated test environment setup to execute modules on working dir:
- Update to new test directory structure, requiring additional pardir
- Fix Mockup motor ctrl. delta calculation when HW limits are activated