I did pull out integration tests already for the cloud-vision repository (though more work is needed GoogleCloudPlatform/cloud-vision#50). It means that Travis can at least run the unit tests for pull requests from other repos, skipping the integration tests.

• Ignore decryption failure.
• Run build without the tests. `mvn verify -DskipTests=true
• Pull out integration tests (that need service account) and run all but those.