Grab images as part of update e2e test

Double quotes.

There's also a problem of using `local` with a `$(...)` expression on the same line, because if the command in the expression fails then the script doesn't break. My suggestion is to declare all local variables at the start or use two lines such as:

```shell
  local host_ip
  host_ip=$("${KUBECFG}" -template "${{.CurrentState.HostIP}}" get "pods/${id}")
```