[FIXED JENKINS-20071] Upgrade bundled versions of credentials and ssh-slaves so we can assume <c:select/> available

[FIXED JENKINS-19926] Add only new env. variables

Add classes and ID's for common elements

[FIXED JENKINS-18393] Do not list any ItemGroup in list-jobs CLI command

Add Java VM name

Added German Localization

Turns out in the new executor on-demand code, queue maintenance happens so quickly that even when a job is submitted with delay 0,
it can still fail the test if the check happens when "new GregorianCalendar()" returns the same value as "top.timestamp".

I'm relaxing that check

Previous patch (3eea3964) broke usescases when evn. variable overwrites already existing one
like PATH = $PATH:/my/path

Integrating the stapler fix.

Consult Descriptor.newInstance() even when proccessing is in the middle
of JSON tree.
(cherry picked from commit d15c1550)

Noting that various DirScanner implementations handle this inconsistently.

[FIXED JENKINS-18836][FIXED JENKINS-18879][FIXED JENKINS-19619] Upgrade trilead-ssh to version with the fix

the page used FilePath.getLocal(), which was removed in
19860fa0 (12/2006)