explain why we change the hostname #11979

Job	Run time
test (apache2)	16s
test (approvals)	16s
test (bibdata)	17s
test (bibdata_sqs_poller)	21s
test (bind9)	21s
test (blacklight_app)	20s
test (byzantine)	21s
test (cantaloupe)	17s
test (capistrano)	21s
test (common)	17s
test (composer)	16s
test (datadog)	15s
test (deploy_user)	23s
test (dpul)	17s
test (drupal10)	17s
test (drush)	21s
test (ealapps)	20s
test (extra_path)	16s
test (ezproxy)	16s
test (ffmpeg)	17s
test (figgy)	16s
test (figgy_filewatcher_worker)	21s
test (figgy_pubsub_worker)	21s
test (fits)	22s
test (freetds)	19s
test (geaccirc)	20s
test (gitlab)	16s
test (hr_share)	21s
test (imagemagick)	25s
test (kakadu)	16s
test (lae)	20s
test (lib_jobs)	15s
test (lib_svn)	22s
test (libwww)	16s
test (lockers_and_study_spaces)	20s
test (mailcatcher)	15s
test (mediainfo)	16s
test (memcached)	21s
test (mflux)	20s
test (mysql)	17s
test (nfsserver)	16s
test (nginx)	21s
test (nginxplus)	17s
test (nodejs)	21s
test (oawaiver)	17s
test (ojs)	18s
test (orangelight)	20s
test (passenger)	16s
test (php)	17s
test (postfix)	17s
test (postgresql)	22s
test (pul_nomad)	15s
test (pulmap)	17s
test (rails_app)	21s
test (redis)	17s
test (researchdata)	18s
test (ruby_s)	15s
test (samba)	17s
test (sssd_ad)	2m 34s
test (shared_data)	21s
test (sidekiq_worker)	19s
test (simple_annotation)	20s
test (sneakers_worker)	16s
test (special_collections)	17s
test (subversion)	18s
test (svn)	22s
test (timezone)	18s
test (tippecanoe)	16s
test (towerdeploy)	18s
test (ufw_firewall)	19s
test (video_reserves)	15s
test (vips)	24s
	24m 23s

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