Proper quoting, error checks, use $KUBE_* variables when applicable, trap to do
cleanup on all errors, call cleanup explicitly on successful exit.
Tested:
- Ran it manually to completion, test run successful.
- Interrupted it during the run, checked that $? was non-zero, etcd was killed.
Signed-off-by: Filipe Brandenburger <filbranden@google.com>