Launch review for packet-test deployment

[cristinaleonr]

• Release changes to support "max_cwnd_gain" and "max_elapsed_time" flags in the Locate.

• Add service parameters map locate#192

• Add max_elapsed_time to service parameters locate#193

• Release packet-test image and pick it up in k8s-support.

• https://github.com/m-lab/packet-test/releases/tag/v0.1.0

• https://github.com/m-lab/packet-test/releases/tag/v0.1.1

• Add packet-test deployment back to mlab-oti project k8s-support#899

• Check that all the pods in the packet-test daemonset are in "Running" status in staging and that the Locate in staging returns healthy instances.
  

• Deploy k8s-support and check that production pods are in "Running" status and that the Locate in production returns healthy instances.

• Update packet-test-js to the production link of the Locate and tag it. Verify that tests run successfully from the client.

• Integrate changes into mlab-speedtest and release it. Run everything end-to-end.

• mlab-speedtest changes merged on 08/23:

• Monitor billing dashboard post-launch.

• No increase in Compute Engine or BigQuery costs.