Fix a bug where 'default' configurations in IDEA projects were being incorrectly created.
Update xpaths to correctly use conjunction in attribtue guards
Prefer ! over not due to precedence rules
Fix spelling mistake revealed by failing test
Correct test to check for scope rather than exports attribtue
Update matcher to ensure it fails on non-match
Ensure that the default configuration method yields so content can be supplied
Add the add_default_testng_configuration method to help IDEA project creation.