AO3-6895 Reduce the number of badly closed database connections #5010

Job	Run time
rake db:otwseed	1m 10s
rspec spec/controllers	13m 18s
rspec spec/models	5m 36s
rspec --exclude-pattern 'spec/{controllers,models}/*/.rb'	8m 20s
cucumber features/admins	8m 0s
cucumber features/bookmarks	4m 27s
cucumber features/collections	9m 16s
cucumber features/comments_and_kudos	8m 56s
cucumber features/gift_exchanges	7m 47s
cucumber features/importing	2m 39s
cucumber features/other_a	11m 34s
cucumber features/other_b	7m 12s
cucumber features/prompt_memes_a	4m 36s
cucumber features/prompt_memes_b	3m 56s
cucumber features/prompt_memes_c	5m 35s
cucumber features/search	6m 34s
cucumber features/tag_sets	3m 11s
cucumber features/tags_and_wrangling	7m 7s
cucumber features/users	5m 1s
cucumber features/works	12m 20s
	2h 16m 35s

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