Add "GDA_SOURCE" property to logging context for server-side/client-side processes
Add uk.ac.gda.client.logging, a fragment for Logback Classic

This fragment doesn't contain any code, but does depend on uk.ac.gda.common.
This makes the gda.util.logging package in uk.ac.gda.common visible to the
Logback Classic classloader.
Changed classpath in object server start up to have no-ui plugins.
Merge branch 'master' of ssh://dascgitolite@dasc-git.diamond.ac.uk/gda/gda-core.git