Clean up httpRequest proto (#74)
Clean up httpRequest proto (#74)

1. Make it not all on one line.
2. Remove appLatencySeconds, since httpRequest is turned into an
HttpRequest proto, which does not have an app_latency_seconds field.
(appLatencySeconds is included as a generic key in the JsonPayload
object due to its intry in the the "keep_keys" tag.)
kmbarry1/appengine-sidecars-docker,kmbarry1/appengine-sidecars-docker,kmbarry1/appengine-sidecars-docker,GoogleCloudPlatform/appengine-sidecars-docker,GoogleCloudPlatform/appengine-sidecars-docker,kmbarry1/appengine-sidecars-docker