Update jar regex in examples and scripts

I tried running the example in README.mapred for 1.4.2 and got an error on the command

$ bin/tool.sh lib/examples-simple*[^c].jar ...
Exception in thread "main" java.lang.ClassNotFoundException: lib.examples-simple-1.4.2-sources.jar

The jar regex need to be updated to exclude the sources jar (currently it just excludes the javadoc jar). We should check other jar regex to make sure they're up to date as well.