Implemented JERSEY-1935.

- Added Resource getParent() method to resource model as well as resource method model.
- Removed ResourceWrapper from runtime resource model classes.
PS2: Removed EagerValues from the Resource

Change-Id: Id0879ba6fac4b7bace1eacb7afdee39856917f87
Signed-off-by: Marek Potociar <marek.potociar@oracle.com>