Add more GCI tests for GCE (alpha, autoscaling, autoscaling-migs, soak)
Add more GCI tests for GCE (alpha, autoscaling, autoscaling-migs, soak)

Job,GCE Project
`kubernetes-e2e-gce-autoscaling`,`k8s-jkns-gci-autoscaling`
`kubernetes-e2e-gce-autoscaling-migs`,`k8s-jkns-gci-autoscaling-migs`
`kubernetes-e2e-gce-alpha-features`,`k8s-jkns-gci-gce-alpha`
`kubernetes-soak-continuous-e2e-gce-1.4`,`k8s-jkns-e2e-gci-gce-soak-1-4`
`kubernetes-soak-weekly-deploy-gce-1.4`,`k8s-jkns-e2e-gci-gce-soak-1-4`

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