modules/aws: enable cluster recovery after cleanup
modules/aws: enable cluster recovery after cleanup

If the assets zip is 0 bytes, then this means that the cluster already
bootstrapped once and the assets bundle was cleaned. In this case, exit
successfully so the kubelet will start and the cluster can be recovered
via bootkube.

coreos/tectonic-installer,coreos/tectonic-installer,coreos/tectonic-installer,coreos/tectonic-installer,coreos/tectonic-installer