Fixes spec failing
Fixes spec failing

Problem was that 'find' method raises ActiveRecord::RecordNotFound if id is not found, while 'find_by' returns nil.
I'll leave the spec correction and 'find_by' replacing for a different PR

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