some ff17 leftovers removed

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9508 5f5364db-9458-4db8-a492-e30667be6df6
upgrade commons-logging to 1.2.

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9509 5f5364db-9458-4db8-a492-e30667be6df6
start work on FF31 ESR support

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9510 5f5364db-9458-4db8-a492-e30667be6df6
add FF31 expectations

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9511 5f5364db-9458-4db8-a492-e30667be6df6
more ff17 cleanup

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9512 5f5364db-9458-4db8-a492-e30667be6df6
add FF31 expectations

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9513 5f5364db-9458-4db8-a492-e30667be6df6
add FF31 expectations

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9514 5f5364db-9458-4db8-a492-e30667be6df6