tests improved, verify added
Merge branch 'tests_improved_verify' of github.com:Ragazzo/yii2 into Ragazzo-tests_improved_verify

Conflicts:
	apps/basic/tests/README.md
	apps/basic/tests/unit/models/LoginFormTest.php
Fixes #1782
Merge branch 'master' of github.com:yiisoft/yii2-app-basic