Remove berr alias as we don't use rails runner.
Update berdm to also prepare test db with message output otherwise nothing shows.

I don't think there is ever a case where I wouldn't want to run rake
db:test:prepare if I'm running migrations. To save time just always run
db:test:prepare so after running migrations when we run tests we don't
wait for a warning that there are migrations or all tests fails.
Add hps alias for heroku ps:scale