Simplifying Success and Error Responses for VSS Request and Get #106

Hi.
I made a PR #106 last week. The amount of Vehicle data will be huge so that one of API design principle should be minimization of a size of exchange data between vehicle client and server.

Request messages from client to the server in both of VSS request and Get have action, path and requestId. So via communication context client could look for action and path matched with requestId in response message from the server. So how about removing these information from response.  What do you think?

This issues discussed in link below.
https://github.com/w3c/automotive/pull/106


Kind regards,
Wonsuk.
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이 원 석 (Wonsuk, Lee) / Senior Researcher, Ph.D
한국전자통신연구원 표준연구센터(Protocol Engineering Center, ETRI)
Mobile: +82-10-5800-3997   Office: +82-42-860-6104
E-mail: wonsuk.lee@etri.re.kr
http://www.wonsuk73.com/, twitter: @wonsuk73
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