scripts: modify script to push kube-etcd-signer-server and kube-client-agent images

[rithujohn191]

This allows Travis CI to push kube-etcd-signer-server and kube-client-agent images to quay

[ericchiang]

lgtm, thanks!

[ericchiang]

@rithujohn191 I don't think this worked

Removing intermediate container bc0bf7ba7728
Successfully built 9118009374de
Successfully tagged quay.io/coreos/kube-etcd-signer-server:a88fa11e0e520d9b280c43bfef1802cfa9829ee0
The push refers to a repository [quay.io/coreos/kube-etcd-signer-server]
a9de20b4874d: Preparing
e53f74215d12: Preparing
unauthorized: access to the requested resource is not authorized
make: *** [push/kube-etcd-signer-server] Error 1

https://travis-ci.org/coreos/kubecsr/builds/347046184#L740

[ericchiang]

Can you move the after_success target to the regular script step? I'd like the build to go red if that step fails

kubecsr/.travis.yml

Line 11 in a88fa11

- ./scripts/after-success.sh

[rithujohn191]

https://travis-ci.org/coreos/kubecsr/builds/347046184

Latest build passed...it was a permission issue....will move the after_success target to the regular script step in another PR