Tests fail fast if product slug and pivnet endpoint are not provided.
Tests fail fast if product slug and pivnet endpoint are not provided.

[#131298379]

Signed-off-by: Rob Dimsdale-Zucker <4df639ba78cac7f8d741d02ef508f2611d6911dd@pivotal.io>

pivotal-cf-experimental/pivnet-resource,crawsible/pivnet-resource,pivotal-cf-experimental/pivnet-resource,crawsible/pivnet-resource