AthenaCommon: Update for py 3.11.
In py 3.11, the format that unittest uses to print test names changes. Update the reference files accordingly. If we're using an older python version, monkey-patch unittest to do what 3.11 does.
In py 3.11, the format that unittest uses to print test names changes. Update the reference files accordingly. If we're using an older python version, monkey-patch unittest to do what 3.11 does.