This is part of work to update the entire JRuby/Maven stack, in
order to update the version of JRuby used and to address API
deprecations at rubygems.org.

This PR updates JRuby to latest (9.4.3.0) and moves all plugins
to their new org.jruby.maven group ID with latest versions.

The maven-tools gem is updated to 1.2.

Part of the fix for jruby/maven-tools#37.

We will need to coordinate getting this released along with the
maven plugins in the very near term. Because of the rubygems.org
API being shut down next week (the 8th), we are under the gun.

See jruby/mavengem#9, jruby/jruby-maven-plugins#126,
jruby/maven-tools#38 and jruby/jruby#7872.

Some of the .0 artifacts still had references to de.saumya and
org.torquebox versions, so all three projects have been updated
to the latest releases and re-released. No functional changes, for
the most part, since the libraries themselves were already using
the new artifacts. This mostly affects tests and documentation and
gets rid of all the old artifact references.