Libvirt-java 0.4.9 works just fine with JNA 3.2.4 which is in
all distributions.
Future libvirt version require at least JNA 3.5.1 due to new methods
and memory management, but that is not our concern now.
By depending on the JNA in the distribution and adding it to the classpath
we can work just fine.
Modify the spec file to package the agent files and the scripts
Some changes to the poms to put the java dependencies in the right place.
Move the agent script to the dedicated os dir in packaging.