[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