add unit test proving that taskExecutor is used when parallelPostprocessing property is turned on
update the scope of jsr166 dependency to provided to avoid security exception and update implementation of ForkJoinTaskExecutor
remove ForkJoinTaskExecutor & use ForkJoinPool by default when it is available.
remove reference to jsr166 from javadoc
fix failing unit test
log parallelPostprocessing configuration when maven plugin starts