Run up to 15 concurrent changes verifications

With the extra power provided by GoogleCloud, we can run many
more concurrent changes verifications.

Change-Id: I92e3a0fe2e3380027d490e4bb727c1a5733bcf9c
1 file changed
tree: d957cedbc1cdecdcec87358e49d36d9773c1d45b
  1. jenkins/
  2. jenkins-docker/
  3. .gitignore