[FIXED JENKINS-5044] catch FileNotFoundException if mojos are executed from a classes directory instead from a jar

Pull individual Dependencys out of DependencyGroups we see in
BuildTrigger.execute and make sure to actually kick those builds off
as well, so that we can have two different dependencies (say, for
different parameters) from one upstream project to a single downstream
project.

Maven2/3 jobs using Maven3 in console output.
With Maven3 the output format for mojos has changed:
- Add a new Maven3MojoNote and use it in MavenConsoleAnnotator.
- This is sufficient for Freestyle jobs running Maven2 or 3 and Maven2/3
  jobs running Maven 2.
- Maven2/3 jobs running Maven 3 are using ExecutionEventLogger for
  printing start of mojo execution to console.

configurations

This change introduces the necessary extension point. The implementation
of this will be in a plugin.

GlobalMatrixAuthorizationStrategy$DescriptorImpl.doCheckName

Fixed incorrect de-allocation of a classloader from the exported object
table.

The fix is a defense-in-depth; it prevents classloaders referenced in
the object graph from doubly released, then we also make it impossible
for bugs like this to deallocate the key classloader.

result history page results in 404

[FIXED JENKINS-9532] 404 when clicking in the weather report column of a build that hasn't yet been run

HistoryWidget.

Some of our tags, such as <optionalBlock> and <dropdownList> involves grouping of sibling table rows, and controlling visibility of them. So when such tags nest to each other, the visibility updates need to be done carefully, or else the visibility could get out of sync with the model (imagine outer group is made visible while inner group is not visible --- if all the rows are simply enumerated and visibility changed, we end up making the inner group visible.)

The rowVisibilityGroup object in hudson-behavior.js is used to coordinate this activity, and this test ensures that it's working.