Use latest FreeBSD 11.2 images on prow tests (#545)
Use latest FreeBSD 11.2 images on prow tests (#545)

The Google agent was updated on FreeBSD 11.2 but prow was only testing
the release image. Tests should be focusing on latest builds.
adjackura/compute-image-tools,GoogleCloudPlatform/compute-image-import,GoogleCloudPlatform/compute-image-import,adjackura/compute-image-tools,GoogleCloudPlatform/compute-daisy,GoogleCloudPlatform/compute-image-tools,zmarano/compute-image-tools,zmarano/compute-image-tools,GoogleCloudPlatform/compute-daisy,GoogleCloudPlatform/compute-image-tools,zmarano/compute-image-tools,adjackura/compute-image-tools,GoogleCloudPlatform/compute-image-tools,GoogleCloudPlatform/compute-image-import