Replace ot_action_submit_flash() with render_flash()
Replace ot_action_submit_flash() with render_flash()

ot_action_submit_flash() does the same thing as render_flash(),
there's no need to have a catalog controller specific version.
(transferred from ManageIQ/manageiq@7af8007a0e3be17acf855909949dea5287de7e49)

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic