Fix for JERSEY-1893: JerseyTest prevents filters from handling forwarded requests
 - added requested feature and test for the Grizzly web test container factory
 - for Servlet filters it should be possible to configure for which dispatcher types they shlould be active
 - by default (in accord with the Servlet spec) only the REQUEST dispatcher type is activated
   if not specified otherwise in the web app descriptor

Change-Id: I40fbfcf41de3985abff2850694558f3976474813
Signed-off-by: Jakub Podlesak <jakub.podlesak@oracle.com>