unify, use same impl at all places

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9726 5f5364db-9458-4db8-a492-e30667be6df6
test fix and IE11 progress

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9727 5f5364db-9458-4db8-a492-e30667be6df6
changes.xml: Java 7 was reverted, as the current build server doesn't support it

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9728 5f5364db-9458-4db8-a492-e30667be6df6
changes.xml: spacing

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9729 5f5364db-9458-4db8-a492-e30667be6df6
tests migrated

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9730 5f5364db-9458-4db8-a492-e30667be6df6