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)

This reverts commit 604e7e07.

[FIXED JENKINS-15297] Add explicit charset declaration to summary page to prevent stacktrace from being displayed mangled

Revert "menu needs to be explicitly inherited"

This reverts commit 7add578b.

Revert "Push Maven site to another repository"

This reverts commit 71d8014b.