Update jetty version number to 9.4.12

[bbpennel]

Jetty 9.4.x versions prior to 9.4.8 are subject to an startup error if any dependencies of a war file being deployed contain module-info.class files from Java 9, whether or not the project is using java 9. Information about this issue can be found here:

https://stackoverflow.com/questions/45311295/error-scanning-entry-module-info-class-when-starting-jetty-server

jetty/jetty.project#1692

Here is an example of the exception:

[main] INFO org.eclipse.jetty.server.Server - jetty-9.4.0.v20161208
[main] INFO org.eclipse.jetty.annotations.AnnotationConfiguration - Scanning elapsed time=4857ms
[main] WARN org.eclipse.jetty.webapp.WebAppContext - Failed startup of context o.s.j.JettyConsoleWebappContext@643b1d11{/,file:///private/var/folders/kh/mfmlr7jn1hxcn151fvnhkpg80000gp/T/fcrepo-webapp-5.0.0-SNAPSHOT-jetty-console.jar_8080/webapp/,UNAVAILABLE}{/Users/danny/code/fcrepo4/fcrepo-webapp/target/fcrepo-webapp-5.0.0-SNAPSHOT-jetty-console.jar}
java.lang.RuntimeException: Error scanning entry module-info.class from jar file:///private/var/folders/kh/mfmlr7jn1hxcn151fvnhkpg80000gp/T/fcrepo-webapp-5.0.0-SNAPSHOT-jetty-console.jar_8080/webapp/WEB-INF/lib/asm-all-repackaged-2.5.0-b32.jar
	at org.eclipse.jetty.annotations.AnnotationParser.parseJar(AnnotationParser.java:891)
	at org.eclipse.jetty.annotations.AnnotationParser.parse(AnnotationParser.java:837)
	at org.eclipse.jetty.annotations.AnnotationConfiguration$ParserTask.call(AnnotationConfiguration.java:159)
	at org.eclipse.jetty.annotations.AnnotationConfiguration$1.run(AnnotationConfiguration.java:464)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:672)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:590)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalArgumentException
	at org.objectweb.asm.ClassReader.<init>(Unknown Source)
	at org.objectweb.asm.ClassReader.<init>(Unknown Source)
	at org.objectweb.asm.ClassReader.<init>(Unknown Source)
	at org.eclipse.jetty.annotations.AnnotationParser.scanClass(AnnotationParser.java:959)
	at org.eclipse.jetty.annotations.AnnotationParser.parseJarEntry(AnnotationParser.java:940)
	at org.eclipse.jetty.annotations.AnnotationParser.parseJar(AnnotationParser.java:887)
	... 6 more

[awoods]

We love jetty-console and it has been very helpful for the Fedora Repository community!
Until this pull-request is accepted and a new release published, we are having to work from a fork :(
https://github.com/fcrepo4-labs/jetty-console

[eirbjo]

I'm on top of a mountain right now, so I have no chance of testing right now, but I'm going to merge now and do the QA and a release when I get back down.

Cheers,
Eirik.

[awoods]

That is fantastic, @eirbjo .
Be safe.

[eirbjo]

1.61 is released and on its way to Maven Central.