RAT-174 CDDL still too slow

* Applied patch from Chris Burroughs to replace Pattern-Matchers with basic String operations. Let's see if CDDL-users complain, but restore performance.



git-svn-id: https://svn.apache.org/repos/asf/creadur/rat/trunk@1629321 13f79535-47bb-0310-9956-ffa450edef68