This adds a test for the podsecuritypolicy chart, as well as a script
to reconfigure minikube with PodSecurityPolity enabled when appropriate.
This change doesn't add the PSP chart to the existing tests, because
the psp chart will have secure defaults in the future, which may
interfere with other charts by default; and it doesn't enable the
admission controller broadly, because turning the AC on without
providing a podsecuritypolicy will break k8s functionality.
Change-Id: I9fd14bb118189cd4ead177b79e39aadbc2096b4a
84333745e2