This moves the kind setup (previously used by Travis) to the e2e runner script
to accomodate the switch to Prow. This provides a KIND_E2E env var to specify
whether to run the tests in kind, or (by default) to run locally).
Given the repository is build and about-to-be tested under openshift organization
we need to change the kubernetes-incubator into openshift. Yet, keeping both repos still in sync.
