Fix batch failed with relative url & Content-Transfer-Encoding have duplicate binary

[sleidor]

Exception with relative URLs

• Add check for IsAbsoluteUri during HttpMessageContent;

Duplicate binary in Content-Transfer-Encoding

• Remove duplicate headers in PanoramicData.OData.Client/ODataClient.Batch.cs, as constructor HttpMessageContent already init with that headers;

UnitTests

• mark datetime UTC for Read_SimpleDateFormat_ParsesCorrectly(), it will failed if your local timezone is UTC + number;
• add WriteToStreamAsync_ShouldIncludeRequiredHeaders() for checking headers in batch;

[codacy-production]

Codacy's Analysis Summary

4 new issues (≤ 0 issue)
0 new security issue
4 complexity
0 duplications
More details

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