Add client ID support to googleMapConfig
Add client ID support to googleMapConfig

According to the [docs][1] client ID start with `gme-` and since they
replace your typical API key we can sniff the apiKey for that prefix to
determin if we are passing the `key` param or the `client` param.

[1]: https://developers.google.com/maps/documentation/javascript/get-api-key#client-id

Matt-Jensen/ember-cli-g-maps,Matt-Jensen/ember-cli-g-maps