Add a new tag to differentiate long-poll and non-long-poll requests for GetWorkflowExecutionHistory API

[longquanzheng]

https://github.com/uber/cadence-java-client/blob/dca853aaa047071caab8b16a345474aa3708d162/src/main/java/com/uber/cadence/serviceclient/WorkflowServiceTChannel.java#L668

This will be important for make sure non-long poll is not running into high latency issue.