Add German translation for TextParameterDefinition.DisplayName

The slave launch thread is another background thread, and it should run
like a super-user

Fix German i18n for Maven deploy

simplify RestartListener.Default using getBusyExecutors()

"ausbringen" is not the correct word, use "veröffentlichen" instead.
This has some overlap with maven release, which is also translated as
"veröffentlichen", but it's obvious from the target name that follows.

German translation of pronouns (ref. https://github.com/jenkinsci/jenkins/commit/effcc2d7aa4f40a3f43185ab0bc22619d6ecea97)

(Could consider throwing IAE if it does not appear to be.
Cannot easily call getRootPath().absolutize() since that requires a connection.)

... as per the discussion in the dev list

Related: https://groups.google.com/forum/?fromgroups#!topic/jenkinsci-dev/TMm-h6Hnb6Q

This can track items as they go through the queue.

Setting a nonempty contextPath turned up a couple problems in the test harness; goTo must be given a relative path.
https://ci.jenkins-ci.org/job/jenkins_main_trunk/2602/testReport/junit/hudson.model/JobTest/readPermission/
com.gargoylesoftware.htmlunit.FailingHttpStatusCodeException: 404 Not Found for http://localhost:47898/jenkins//j_acegi_security_check
	at com.gargoylesoftware.htmlunit.WebClient.throwFailingHttpStatusCodeExceptionIfNecessary(WebClient.java:549)
	at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:333)
	at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:357)
	at com.gargoylesoftware.htmlunit.html.HtmlForm.submit(HtmlForm.java:196)
	at org.jvnet.hudson.test.JenkinsRule$WebClient.login(JenkinsRule.java:1776)
	at org.jvnet.hudson.test.JenkinsRule$WebClient.login(JenkinsRule.java:1788)
	at hudson.model.JobTest.readPermission(JobTest.java:182)

This reverts commit 9fb2a025.

This reverts commit f460e1e8.

[JENKINS-18326] add maven site support for nested submodules
Thanks!

[JENKINS-16845] Properly report the IllegalStateException, rather than throwing an NPE producing the exception message.
java.lang.NullPointerException
	at hudson.model.Run.getFullDisplayName(Run.java:711)
	at hudson.model.Run.toString(Run.java:706)
	at java.lang.String.valueOf(Unknown Source)
	at java.lang.StringBuilder.append(Unknown Source)
	at hudson.model.AbstractBuild.getPreviousBuild(AbstractBuild.java:218)

See f8916a839c5a7bfe6d0de100a33cf23de33de6e4 for the corresponding change in the remoting.

Since the error messages only use ASCII

As Jesse pointed out, contextual information is often useful in authenticating the build, which means we need to take Queue.Item (initially AbstractBuild was the parameter, which provided the context, and I failed to accommodate that in transition to AbstractProject.)

To still allow Queue.Tasks to provide a meaningful value fallback to Queue.Task.getDefaultAuthentication() as opposed to hard code it to ACL.SYSTEM. This allow plugins like remote-terminal-access to supply a meaningful secure value without forcing a configuration change to the user.