minor optimization

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9188 5f5364db-9458-4db8-a492-e30667be6df6
code cleanup; introduce some constants for predefined targets

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9189 5f5364db-9458-4db8-a492-e30667be6df6
pom.xml: upgrade commons-lang to 3.3.1

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9190 5f5364db-9458-4db8-a492-e30667be6df6