Test sequence failure

[bbuchalter]

Steps to reproduce

1. dev clone lhm
2. git checkout 1c1ef3d
3. TESTOPTS="--seed=57915" bundle exec rake integration

Error message

1) Error:
Lhm::cleanup::changes::cleanup#test_0004_should show temporary triggers:
Lhm::Error: lhmn_users should not exist; not cleaned up from previous run?
    /Users/brianb/src/github.com/Shopify/lhm/lib/lhm/command.rb:45:in `error'
    /Users/brianb/src/github.com/Shopify/lhm/lib/lhm/migrator.rb:197:in `validate'
    /Users/brianb/src/github.com/Shopify/lhm/lib/lhm/command.rb:11:in `run'
    /Users/brianb/src/github.com/Shopify/lhm/lib/lhm/invoker.rb:43:in `run'
    /Users/brianb/src/github.com/Shopify/lhm/lib/lhm.rb:49:in `change_table'
    /Users/brianb/src/github.com/Shopify/lhm/spec/integration/cleanup_spec.rb:15:in `block (4 levels) in <top (required)>'
    /Users/brianb/src/github.com/Shopify/lhm/spec/integration/integration_helper.rb:208:in `simulate_failed_migration'
    /Users/brianb/src/github.com/Shopify/lhm/spec/integration/cleanup_spec.rb:14:in `block (3 levels) in <top (required)>'