Fix go coding style issue. (#5)
Fix go coding style issue. (#5)

* Fix go coding style issue.
Add comments to justify use of log.Warn vs log.Fatal for
stackdriver exporter creation.

* Removed Timeout option for grpc conn as it was a Noop without WithBlock() option
Fixed comments as well.

census-ecosystem/opencensus-microservices-demo,census-ecosystem/opencensus-microservices-demo,census-ecosystem/opencensus-microservices-demo,census-ecosystem/opencensus-microservices-demo,census-ecosystem/opencensus-microservices-demo,census-ecosystem/opencensus-microservices-demo,census-ecosystem/opencensus-microservices-demo