OpenId::buildAxParams() fixed to add "openid.ax.required" parameter if required attributes are not empty.

This reverts commit 90c2f109.

Fixes #1586: `QueryBuilder::buildLikeCondition()` will now escape special characters and use percentage characters by default

Merge branch 'debug_module_improvements' of github.com:Ragazzo/yii2 into Ragazzo-debug_module_improvements

Conflicts:
	extensions/yii/debug/panels/DbPanel.php