Apply refactored "conversation" (tap) data to TShark.

I intentionally left the fields displayed alone (so they don't exactly match Wireshark GUI), because as Guy points out in bug 6310, not sure its A Bug or A Feature.  But at least all types of conversations allowed are in sync with Wireshark GUI.

Bug:6310
Change-Id: I722837df510a39dadc1f9a07a99275509516698c
Reviewed-on: https://code.wireshark.org/review/3212
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>