Add terraform (used by bbl) to Dockerfile
Add terraform (used by bbl) to Dockerfile

Signed-off-by: Victoria Henry <66fccb2034757a42a8bcb8aeddd1312b1af25a11@pivotal.io>

cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci