JERSEY-2320: EJB singleton bean registered as an exception mapper causes deployment failure.
  - added test case and fixed the original issue
  - added EJB stateless bean as exception mapper
  - made sure both EJB beans get properly injected

Change-Id: I16d653c8b4f1fb35d2e054d94a1dddc538b0ae84
Signed-off-by: Jakub Podlesak <jakub.podlesak@oracle.com>
Merge "JERSEY-2320: EJB singleton bean registered as an exception mapper causes deployment failure.   - added test case and fixed the original issue   - added EJB stateless bean as exception mapper   - made sure both EJB beans get properly injected"