Add convenience properties for discovery config items
Add convenience properties for discovery config items

Test file pattern and test method prefix configured via config file,
not command line.

ezigman/nose2,ptthiem/nose2,ojengwa/nose2,ptthiem/nose2,little-dude/nose2,ezigman/nose2,little-dude/nose2,leth/nose2,leth/nose2,ojengwa/nose2