Bug fixes for restEASY and proper registration order of Guice filter.

- Moved ResourceProcessor to its appropriate location.
- Ignore interfaces annotated with @Path instead of throwing exception,
  restEASY client is a a common scenario where interfaces are annotated with @Path.
- Extended restEASY unit test to inject request scope component to ensure that request scope
  is active in the servlet container.
- Prioritized the ‘guice filter’ in ServletContainer to be first.