GATEWAY-3371 subtask GATEWAY-3385: PD Sync and unit tests.
GATEWAY-3180: bugfix for refactor of passthru pd def resp.
GATEWAY-3371 subtask GATEWAY-3385: pd def req.
GATEWAY-3371 subtask GATEWAY-3385 pd def resp.
GATEWAY-3180: bugfixes for pd standard.
GATEWAY-3371: addressing cr comment.
GATEWAY-3180: final minor clean up.
Merge pull request #360 from msweaver/GATEWAY-3371

Gateway 3371