Add a few more barrier calls.
Make executable.
Minor fix in fixture use.
Add -B to python in unit/python/scripts/*.sh
Add paths utilities to shared test code.
Remove deliberately failing test.
Add dummy rule for removed system tests to keep buildbot green.
Some comments in cmake test targets.
Attempt at indirectly controlling dependency execution order in run_unittests so serial tests run first.
Merge branch 'aslakbergersen/topic-change-unittest-to-pytest' into next