please review the test suite improvement patch.
Description: Add all topology fixtures in conftest.py
for all suites and refactor them accordingly.
Fix PEP8 and some logic issues.
Set 2016 date in licenses.
For now we have:
- topology_st - with topology_st.standalone inst;
- topology_m2 and topology_m4 - with dicts
Using this setup we can easily run
and agreements in loops.