Tests JAXP parser overrideablity on a per-application basis

- Initial setup
  - Copy xercesImpl.jar to domains/domain1/lib/applibs/

- To run individual tests 
  - Follow steps outlined in "Initial Setup"
  $ cd $APS_HOME
  $ $S1AS_HOME/bin/asadmin start-domain domain1
  $ ant startDerby
  
  $ cd <indiv-test-dir>
  $ ant all