AO3-5860 Prevent leaving comments or kudos when logged in as admin #3964

Job	Run time
rake db:otwseed	1m 17s
rspec spec/controllers	10m 38s
rspec spec/models	5m 38s
rspec --exclude-pattern 'spec/{controllers,models}/*/.rb'	7m 35s
cucumber features/admins	4m 43s
cucumber features/bookmarks	4m 52s
cucumber features/collections	6m 1s
cucumber features/comments_and_kudos	6m 15s
cucumber features/gift_exchanges	6m 54s
cucumber features/importing	3m 31s
cucumber features/other_a	10m 25s
cucumber features/other_b	6m 21s
cucumber features/prompt_memes_a	4m 25s
cucumber features/prompt_memes_b	4m 12s
cucumber features/prompt_memes_c	5m 16s
cucumber features/search	6m 58s
cucumber features/tag_sets	3m 44s
cucumber features/tags_and_wrangling	5m 57s
cucumber features/users	5m 13s
cucumber features/works	13m 9s
	2h 3m 4s

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