[JENKINS-18410] NPE from previous fix (fcdf7499) under some conditions, which the test case was not exercising.
java.lang.NullPointerException
	at hudson.tasks.test.AggregatedTestResultPublisher$TestResultAction.getProject(AggregatedTestResultPublisher.java:173)
	at hudson.tasks.test.AggregatedTestResultPublisher$TestResultAction.<init>(AggregatedTestResultPublisher.java:146)
	at hudson.tasks.test.AggregatedTestResultPublisher$TestResultAction.<init>(AggregatedTestResultPublisher.java:135)
	at hudson.tasks.test.AggregatedTestResultPublisher.perform(AggregatedTestResultPublisher.java:90)

[JENKINS-18678] Tweaking API, adding @since & changelog for #1075, fixing purgeCache so that test can pass.

[FIXED JENKINS-21024] Catch a full range of XStreamException’s during deserialization, including rethrown exceptions from readResolve.

[JENKINS-20951] [JENKINS-18410] Did not make it into 1.544 due to validated merge holdups (mostly randomly failing tests, sigh).

[FIXED JENKINS-20951] XmlFile.read/unmarshal needs to catch general XStreamException so as to include CannotResolveClassException, thrown when a TopLevelItem provided by a plugin is unloadable.

[FIXED JENKINS-18410] AbstractTestResultAction should be a RunAction2 so it need not persist its owning build.

[FIXED JENKINS-17929] Pick up transport authentication from groovysh command, by overriding run rather than main.

Defer the notification to avoid deadlock.

The size is in wchar_t, not in bytes

Added a patched version of jzlib from
https://github.com/kohsuke/jzlib/tree/jzlib-1.1.3-kohsuke-1 to better
understand the deflate problem.