Setting network latency seems to prevent requests from completing at all

Most likely the value used for `throughput` in `geb.Browser.setNetworkLatency()` is too high. Check why it's not been caught even though there seems to be [a test that should catch it](https://github.com/geb/geb/blob/da477e69f31eb05e8ba38af710d4742560c5cbee/module/geb-core/src/test/groovy/geb/BrowserNetworkLatencySpec.groovy#L54).