[JENKINS-18678] Tweaking API, adding @since & changelog for #1075, fixing purgeCache so that test can pass.

This change resolve the issue with missing builds after the jobs renaming and further cleanup of cache.
Finally, the cache's directory location will be updated after the each job renaming.
https://issues.jenkins-ci.org/browse/JENKINS-18678



Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>

Add optional version arg to build.sh usage message

fix typo in help in Japanese

Fix Malformed \uxxxx encoding

Fix portuguese translation

Allow SCMPollListener subclasses to provide UI elements

Otherwise Descriptor.getHelpFile(null) is called, which may produce a help page, but generally the wrong one.
(entry.jelly was already correct, so just making it consistent.)

set file.encoding=UTF-8 as default in OS X runner

Seems to have caused spurious timeout errors.
https://jenkins.ci.cloudbees.com/job/core/job/jenkins_main_trunk/1748/testReport/junit/hudson.scheduler/CronTabEventualityTest/testFirstSundayOfMonthWillBeEventuallyTriggeredWithinOneMonthAndOneWeek_0_/
java.lang.Exception: test timed out after 1000 milliseconds
	at java.io.UnixFileSystem.getBooleanAttributes0(Native Method)
	at java.io.UnixFileSystem.getBooleanAttributes(UnixFileSystem.java:242)
	at java.io.File.exists(File.java:772)
	at sun.misc.URLClassPath$FileLoader.getResource(URLClassPath.java:1072)
	at sun.misc.URLClassPath.getResource(URLClassPath.java:199)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:358)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at hudson.scheduler.CronTab.set(CronTab.java:87)
	at hudson.scheduler.CronTab.<init>(CronTab.java:83)
	at hudson.scheduler.CronTab.<init>(CronTab.java:66)
	at hudson.scheduler.CronTabEventualityTest.checkEventuality(CronTabEventualityTest.java:113)
	at hudson.scheduler.CronTabEventualityTest.testFirstSundayOfMonthWillBeEventuallyTriggeredWithinOneMonthAndOneWeek(CronTabEventualityTest.java:109)

[FIXED JENKINS-21024] Catch a full range of XStreamException’s during deserialization, including rethrown exceptions from readResolve.

Fix french translation

[JENKINS-11429] Add a column "Success" in test result table

h.n.AbstractNodeMonitorDescriptor$Record#<init>: Previous Free Disk Space monitoring activity still in progress. Interrupting
h.n.AbstractNodeMonitorDescriptor$Record#run: Unexpected node monitoring termination: Free Disk Space
java.lang.InterruptedException
	at java.lang.Object.wait(Native Method)
	at hudson.remoting.Request$1.get(Request.java:272)
	at hudson.remoting.Request$1.get(Request.java:210)
	at hudson.remoting.FutureAdapter.get(FutureAdapter.java:59)
	at hudson.node_monitors.AbstractAsyncNodeMonitorDescriptor.monitor(AbstractAsyncNodeMonitorDescriptor.java:97)
	at hudson.node_monitors.AbstractNodeMonitorDescriptor$Record.run(AbstractNodeMonitorDescriptor.java:282)