please_cli: fix quotes (#1770)
please_cli: fix quotes (#1770)

* please_cli: fix quotes

I started getting this message after recent changes:

```
Error response from daemon: network "host" not found
```

After some debugging I found that the constructed command line contains
single quotes:

```
docker run --privileged -td ... '--network="host"' mozillareleng/services:base-52
```

With single quotes removed, it runs as expected.

La0/mozilla-relengapi,mozilla-releng/services,La0/mozilla-relengapi,La0/mozilla-relengapi,mozilla-releng/services,La0/mozilla-relengapi,mozilla-releng/services,mozilla-releng/services