Some clean-up and minor performance improvements. Replace  the usage of HashTable with the unsynchronized HashMap.
Some clean-up and minor performance improvements. Replace 
the usage of HashTable with the unsynchronized HashMap.

git-svn-id: 21df804813e9d3638e43477f308dd0be51e5f30f@603813 13f79535-47bb-0310-9956-ffa450edef68

ronsigal/xerces,jimma/xerces,jimma/xerces,ronsigal/xerces,jimma/xerces,ronsigal/xerces