use fig to run integration tests for dird
build the integration test images in the tests directory
rename tests to integration_tests
rename tests to integration_tests
use test-requirements.txt in .travis.yml
typo
Merge branch 'fig-integration-tests'

* fig-integration-tests:
  typo
  use test-requirements.txt in .travis.yml
  rename tests to integration_tests
  rename tests to integration_tests
  build the integration test images in the tests directory
  use fig to run integration tests for dird