Remove unnecessary this qualifier

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/email/trunk@1507599 13f79535-47bb-0310-9956-ffa450edef68
Organize imports

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/email/trunk@1507600 13f79535-47bb-0310-9956-ffa450edef68