update spec to use ruby package until we move away from ruby nats

Signed-off-by: Zach Robinson <zrobinson@pivotallabs.com>
Bump src/hm9000

Bump cloudfoundry/hm-workspace:
  Alex Suraci and Onsi Fakhouri:
     switch to gnatsd, add clustering support ( Travis Success: https://travis-ci.org/cloudfoundry/hm-workspace/builds/14383076 )