Added a listener that gets called at the end of the test to provide opportunity for a cleanup.
This avoids the code duplication between HudsonTestCase vs JenkinsRule, too.

(cherry picked from commit 9c4cb4b5eca4fbeba5730b66f52042f647075ff8)

Fixed confirmPOST JS utility not working with CSRF protection enabled.

[JENKINS-17713] [FIXED JENKINS-14362] These fixes were (mistakenly?) recorded for 1.518 rather than for trunk.

Use jzlib

Conflicts:
	core/pom.xml

[JENKINS-18368]: Decorated Launcher Does Not Maintain "isUnix" for RemoteLauncher

Links are now correct, thanks to Ancestor.getRelativePath as called from getRelativeLinkTo being correct.
But getRelativeNameFrom is not working, so anchor texts are ‘project » module’ rather than simply ‘module’.

Integrated the new version of Stapler that fixes them.

Add CloudProvisioningListener extension point, allowing extensions to block cloud provisioning and be notified of provisioning events

properties that are applicable to the master node only and node properties
that can be applied to all nodes