Currently if any of the test cases fail the build is marked unstable. This patch changes it so that if any of the Selenium assert* methods, in any of the cases in the suite fail the build will be marked as a failure and if any of the Selenium verify* methods, in any of the cases in the suite fail the build will be marked as unstable.

This change better reflects the differences between an assertion (an unrecoverable error) vs a verification (something isn't quite right but the test can continue).