Added Authentication-Method and afew other AVPs that appear in the SIP-Auth-Data-Item grouped AVP.

Change-Id: Ie90ec71d8d574d38f32a5ff3de6ad5433b9e5e9f
Reviewed-on: https://code.wireshark.org/review/3823
Reviewed-by: Anders Broman <a.broman58@gmail.com>