Fix namespace.
Use strict comparison.
Remove unneeded "use" statements.
Add newline at end of file.
Remove unused variables.
Add back response property assignment removed by mistake.
Fix broken primary key check for SqliteSchema.
Rename EventListener to EventListenerInterface.
Add EventListener class for backwards compatibility.
Merge pull request #4898 from cakephp/3.0-cleanup

3.0 cleanup