Create e2e-gce{,-gci}{,-reboot,-serial,-slow}-release-1.6 jobs
Create e2e-gce{,-gci}{,-reboot,-serial,-slow}-release-1.6 jobs

GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid