Update discovery template

[comewalk]

This PR includes following updates.

• Change discovery URL
• Add discovery_service_url option to Google::API::Client::build method

And I will create a new PR for bumping version soon. Then I will upload new version.

Change discovery URL

By this change, this module uses new discovery URL

• Previous https://www.googleapis.com/discovery/v1/apis/{api}/{apiVersion}/rest
• Current https://{api}.googleapis.com/$discovery/rest?version={apiVersion}

Some APIs are still using previous URL though, it is converted by detecting services in Google::API::Client::_is_v1_discovery_url.

discovery_service_url option

You can specify discovery URL by using discovery_service_url option like below. (Following code does not work. Because the discovery URL is dummy.)

my $client = Google::API::Client->new;
my $service = $client->build('youtube', 'v3', {discovery_service_url = 'https://www.example.com/rest/'});

Other

• Add tests
• Add searchconsole example

Thanks

Thanks to @robhammond and @7mho7. Their PRs, #26 and #27, helped me to create this PR.