* ansible-galaxy - support resolvelib versions >= 0.5.3, <= 0.8.1
Test incompatibilities are removed for resolvelib >= 0.6.0
Test against the latest 0.8.x version and fix requirements
* Fix tests - use a venv for testing the range of resolvelib versions
* Update temporary hardcoded fallback for ansible-test
* Update hardcoded upperbound for sanity tests
* Make error check more flexible