Bundle libraries are already added to the classpath by OSGi's
ClasspathManager::addStandardClassPathEntry. If they are also included
in dev.properies, they will be on the classpath twice. Duplicated
resource files may cause issues (e.g.: "SLF4J: Class path contains
multiple SLF4J bindings.").

This change essentially reverts Bug 327371.


Change-Id: I8a269eeb1a2ed961841a1ff9449f4afa46a8d0c9
Signed-off-by: Julian Honnen <julian.honnen@vector.com>