AO3-6483 Make old password changes deserializable (#4638) #3153

Job	Run time
rake db:otwseed	1m 26s
rspec spec/controllers	14m 21s
rspec spec/models	6m 27s
rspec --exclude-pattern 'spec/{controllers,models}/*/.rb'	12m 4s
cucumber features/admins	6m 12s
cucumber features/bookmarks	7m 12s
cucumber features/collections	7m 6s
cucumber features/comments_and_kudos	6m 55s
cucumber features/gift_exchanges	11m 54s
cucumber features/importing	3m 19s
cucumber features/other_a	11m 10s
cucumber features/other_b	8m 42s
cucumber features/prompt_memes_a	4m 52s
cucumber features/prompt_memes_b	5m 3s
cucumber features/prompt_memes_c	7m 20s
cucumber features/search	8m 17s
cucumber features/tag_sets	3m 59s
cucumber features/tags_and_wrangling	6m 57s
cucumber features/users	7m 30s
cucumber features/works	19m 14s
	2h 40m 0s

Provide feedback