Undid the change made in commit #ca393e9 (fixing NPE when apps dont have
a WEB-INF) as I can't replicate this NPE, whereas the change actually
breaks the ability for apps to be defined without 'WEB-INF' directories.
Updated the release notes to inform people about the need to either
update 'WEB-INF' or delete it entirely for old apps.
Removed the 'alpha' prefix from the 'test-integration' command.