Clearly state that FingerprintAction, not UpstreamCause, is used for all upstream/downstream methods in this class (contrary to what you might expect).

Lots left untested—*fingerprint* and so on.

Conflicts:
	changelog.html

Fixed JENKINS-15293
Thanks

do not remove maven installation which does not have a home, like maven installation with automatic installer (bug associated with JENKINS-14510 fix ... sorry..)

Show message that slave has been already launched instead of source not ...

Fixing ClassCastException
Thanks!

casting the toArray result will sometimes cause ClassCastExceptions.
i.e.:
Caused by: java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to [Ljava.lang.String;
	at hudson.security.WhoAmI.getAuthorities(WhoAmI.java:65)