Not support “If-Match” header which is defined in Odata protocol

[vincedan]

current restier version does not support “If-Match” header which is defined in Odata protocol

please compare related logic in src\Microsoft.Restier.AspNetCore\RestierController.cs with with old version(1.0 beta ?). I was wondering something is wrong for handling “If-Match” header and If-None-Match.

Reproduce steps

I use my sample like the following.

--batch_982c-c2f0-75d9
Content-Type: multipart/mixed; boundary=changeset_52bc-e45a-1b95

--changeset_52bc-e45a-1b95
Content-Type: application/http
Content-Transfer-Encoding: binary

PATCH Users(00000aa0-29bb-4904-98bc-71d4900cd10d) HTTP/1.1
Content-ID: 0
IfMatch: W/"YmluYXJ5J0FBQUFBQUFBQ2pvPSc="
Prefer: return=representation
Accept: application/json;odata.metadata=full
Content-Type: application/json;IEEE754Compatible=true

{"FirstName":"3","UserKind":0,"EmployeeType":0}
--changeset_52bc-e45a-1b95--

--batch_982c-c2f0-75d9--

in addition, please add some testcases for these headers.
Thanks in advance.

[vincedan]

Duplicate of #747
I will follow 747 and comment there。