Fixed JERSEY-1638.

- JAX-RS Configuration must return an empty map, not null from getContracts() for unknown provider classes.
- Updated Copyright headers

Change-Id: I4dd9a82becfe390889bf154caaa6b2e254c1a66a
Signed-off-by: Marek Potociar <marek.potociar@oracle.com>
Merge "Fixed JERSEY-1638."