Fixed tests to disabling thrown of FailingHttpStatusCode exception

[breakponchito]

The tests fixed here were designed to validate error page response. On some servers this is causing to thrown the FailingHttpStatusCode exception causing to fail the tests (Payara server is an example). This PR is to disable this behaviour that is part of the HtmlUnit implementation. This will help some servers to pass TCK by omitting the FailingHttpStatusCode exception

challenge created

[manovotn]

Fixes #389

[Ladicek]

LGTM, but I don't know what's the proper workflow when it comes to TCK challenges or so, so I'll leave that to you @manovotn :-)

[manovotn]

I am not familiar with the flow from docs either, but I'd just go with making another release as we have this plus one other fix present already. Scott would know for sure but I think he's out of office now.

Also, as I stated in the issue, I don't think this is actually a valid challenge per se because the test doesn't care what's the HTTP status code returned. The test also exists for a long time in unchanged manner and I think what's causing these issues to emerge is a tooling upgrade done in 0f9f0a4
Htmlunit now defaults to throwing an error where it was previously silently ignoring it.

So while not a challenge to what we assert, it is definitely a ground for improvement.

[Ladicek]

Okay gotcha. This is a simple bugfix then. Makes sense.

[breakponchito]

thank you guys to merge this