Improved ChildBlockLengthCheck a bit

Improved ChildBlockLengthCheck to show current size of 'bad' blocks, not only allowed sizes for it.

Also I have fixed the problem which lies in the fact that Maven is unable to find system 'com.sun:tools' library (which comes with Sun Java by default and present in JAVA_HOME/lib, but invisible for Maven).

see http://stackoverflow.com/questions/8375423/missing-artifact-com-suntoolsjar
and http://maven.apache.org/general.html - paragraph ' How do I include tools.jar in my dependencies? '

Check works well on Revere sources (I have re-tested it over dmt and rp sources)