Spring bugfix release JETM 1.2.3

After a long and quiet period Jürgen Englisch joined the "team" and helped me fixing the currently existing Springframework 2.5 issues. Thanks Jürgen!

Download JETM 1.2.3 here (Maven 2 artifacts should be available soon).

Full changelog:

Changes, Fixes and Improvements
 - Fixed NoSuchMethodError with Spring 2.5
 - Removed "new DefaultTimer()" dependencies and replaced it with
   EtmManagerFactory.bestAvailable() invocations
 - Added "bestAvailable" as a timer configuration value in spring xsd
 - Removed unnecessary ant-junit.jar which can lead to FileNotFoundExceptions
   during test execution via ant