improve warden networks

Each container is a /30 and the network pool is actually 4x what I thought it
was. There are now 64 static IPs available in each network.

You'll need the latest spiff to generate a new template with this change.
Bump src/hm9000

Bump cloudfoundry/hm-workspace:
  Alex Suraci and Onsi Fakhouri:
     added evacuator ( Travis Failed: https://travis-ci.org/cloudfoundry/hm-workspace/builds/12944956 )
warden: add dummy loggregator shared secret
Merge branch 'master' of https://github.com/cloudfoundry/cf-release