removing redundant bundles from local+build repo
Added missing bundles to the BND build path because they are required by unit tests.
It wasn't obvious that Xtext uses log4j and xtext utils at runtime.

org.apache.log4j (provided by paxlogging)
org.eclipse.xtext.util
Added PAX logging framework as a replacement for various legacy logging APIs.

The bundle "org.ops4j.pax.logging.pax-logging-api-1.7.4.jar" is a replacement (frontend) for bundles such as org.apache.log4j or org.apache commons.logging (and more)

The bundle "oorg.ops4j.pax.logging.pax-logging-service-1.7.4.jar" is an implementation of the Osgi LogService (backend) which replaces e.g. org.apache.felix.log
Improved run configuration for our FOAM tool.
Now the logging is handled by PAX.
We use a simple configuration through OSGi properties.
Fixed a bug in FileUtils.bundleCopy() method which was only able to copy files form its parent bundle. Now, there is a parameter which defines the source bundle to copy from.
Merge branch 'logging-pax'