Riemann: add support for TCP transport

Bug: 10770
Change-Id: I101d0152f41c0ab3d7f0fa0ccab6dec3b9e68f0d
Reviewed-on: https://code.wireshark.org/review/5741
Reviewed-by: Evan Huus <eapache@gmail.com>
Petri-Dish: Evan Huus <eapache@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>