strip down z2
strip down z2

Signed-off-by: Dave Liebreich <6a8d19c3bed52d86e0748556e5bb07ce7e47962b@pivotallabs.com>

cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release