AO3-6862 Use official example domain #4757

Job	Run time
rake db:otwseed	1m 5s
rspec spec/controllers	12m 21s
rspec spec/models	5m 51s
rspec --exclude-pattern 'spec/{controllers,models}/*/.rb'	7m 34s
cucumber features/admins	6m 22s
cucumber features/bookmarks	4m 24s
cucumber features/collections	5m 35s
cucumber features/comments_and_kudos	6m 48s
cucumber features/gift_exchanges	6m 59s
cucumber features/importing	2m 47s
cucumber features/other_a	10m 23s
cucumber features/other_b	6m 11s
cucumber features/prompt_memes_a	3m 47s
cucumber features/prompt_memes_b	3m 32s
cucumber features/prompt_memes_c	4m 57s
cucumber features/search	6m 16s
cucumber features/tag_sets	3m 12s
cucumber features/tags_and_wrangling	6m 45s
cucumber features/users	4m 39s
cucumber features/works	12m 53s
	2h 2m 21s

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