Excluded jenkins-war from the test harness.

Latest & greatest version of Stapler

Previously, when the 2nd `e.click()` is called, the page has already transitioned to another page, so the anchor objects have become invalid.

HtmlUnit somehow still manages to follow a link, except when there's some JavaScript attached to the onclick() handler it's going to execute in a strange environment. Some management link requires a POST, and that was done via JavaScript. So that broke the test.

Whilst this is not used in the dependencies, the enforcer plugin downloads
the i1.580.1 jar so it can scan it.  Most likely a bug in the
extra-enforcer-rules but we obviously don;t need it as we have an explicit
dependency on the latest version!

[FIX JENKINS-32303] Fix readonly behavior for f:checkbox

Integrate newer version of test-harness

Removes mention of http.proxyHost property

The root problem was missing <scope>test</scope> in domain-discovery.

[JENKINS-33068] AsyncPeriodicWork/AsyncAperiodicWork log files rotation

Fix proxy server name documentation

Pull in new version of Stapler

Adding a module to allow organizations to track usage of Jenkins within their domain