fix(config): update collector endpoint

Author: gergelyke

lib/config.js

@@ -5,7 +5,7 @@ var config = {};
 config.collectInterval = 10 * 1000;
 config.sampleSize = 60;
 
-config.collectorApi = 'http://comingsoon.trace.risingstack.com';
+config.collectorApi = 'http://trace-collector-api.risingstack.com';
 config.collectorApiServiceEndpoint = '/service';
 config.collectorApiSampleEndpoint = '/service/sample';