Find and update details of service owner for the HTA

The HTA service documentation lacks details of the service owner, this issue is to find out who this person is, and update the HTA page in the guidebook.

mentioned in merge request !67 (merged)

changed the description

mentioned in commit c5320b2d

mentioned in merge request !298 (merged)

mentioned in commit 5a2a3ff6

closed with merge request !298 (merged)

closed with commit c5320b2d