Add tracer bullet integration test that shows dynamic response from fake broker. (openshift#1538)

Combine sync and async basic flows into a single test.
Build fake broker client configuration from default happy path configuration.

Author: staebler

glide.lock

@@ -93,4 +93,4 @@ import:
 - package: github.com/gorilla/context
   version: 215affda49addc4c8ef7e2534915df2c8c35c6cd
 - package: github.com/pmorie/go-open-service-broker-client
-  version: 9e257974620c1db53c4d3549fd9eddaa2d2d653e 
+  version: 31d8027f493f8f23f850415d171c7c52a972a6f2