Use c3.large for compilation
Use c3.large for compilation

- Because c4.larges don't have ephemeral disks. They require explicit
configuration and we don't really need the performance of c4 anyways.

cloudfoundry-incubator/v1-dummy-broker-release,cloudfoundry-incubator/v1-dummy-broker-release,cloudfoundry-attic/v1-dummy-broker-release,cloudfoundry-attic/v1-dummy-broker-release,cloudfoundry-incubator/v1-dummy-broker-release,cloudfoundry-attic/v1-dummy-broker-release,cloudfoundry-incubator/v1-dummy-broker-release,cloudfoundry-attic/v1-dummy-broker-release