improve consistent use of TestHelper, code covering filtering, and @group tags
improve consistent use of TestHelper, code covering filtering, and @group tags

git-svn-id: abaeb2b3ba5a94ed391a9405ad7d63d0414021c9@19582 44c647ce-9c0f-0410-b52a-842ac1e357ba

mleko/zend-mail,basz/zend-mail,stefanotorresi/zend-mail,Xerkus/zend-mail,matbech/zend-mail,MadCat34/zend-mail,rapidsoft-de/zend-mail