give apps a chance to crash

Crashes are not instant.  Give them time to actually crash.

Change-Id: I47cc1ffce35c67484a6f74e7aa50f2c34b2f0d99
Reviewed-on: http://reviews.cloudfoundry.org/13069
Tested-by: CI Master <cf-ci@rbcon.com>
Reviewed-by: Pin Xie <pxie@vmware.com>