CR-4219 Fix for OPENIG-137: NoSuchMethodError when an expression tries to invoke a method

git-svn-id: https://svn.forgerock.org/openig/trunk@506 dbb9e58e-28e6-4ce0-90e8-f11d9605b710
CR-4220 Fix for OPENIG-271: Unused import in Scripting Dispatch example

git-svn-id: https://svn.forgerock.org/openig/trunk@507 dbb9e58e-28e6-4ce0-90e8-f11d9605b710
Additional fix for OPENIG-163, copy/paste/forgot-to-update error spotted by Ludo

git-svn-id: https://svn.forgerock.org/openig/trunk@508 dbb9e58e-28e6-4ce0-90e8-f11d9605b710