Updating pipeline.yml to run bosh-load-tests against legacy manifests.
Updating pipeline.yml to run bosh-load-tests against legacy manifests.

[#111573906](https://www.pivotaltracker.com/story/show/111573906)

Signed-off-by: William Lindner <07e881a60bf9e51606643ece30b1d2ad0de68928@pivotal.io>

barthy1/bosh,barthy1/bosh,barthy1/bosh,barthy1/bosh