Change generated MANIFEST.MF location

Change generated MANIFEST.MF location

This patch moves the generated MANIFEST.MF for
OSGi from the target/classes/META-INF folder to
./META-INF for non-web bundles, and to
./src/main/resources/META-INF for web bundles.
This fixes a problem in Eclipse where it would
think that the project is always out of sync,
indicating this on the OSGi run configuration.

Change-Id: I02c2af4bf80a7f1fe66f53ddf3ae24232d8b83ec
Signed-off-by: David Erickson <daviderickson@cs.stanford.edu>