add ErrorDataReader to the project

Author: srijken

Source/Tests/Exceptionless.Tests.csproj

@@ -157,6 +157,7 @@
     <Compile Include="Storage\PersistedDictionaryTests.cs" />
     <Compile Include="Submission\DefaultSubmissionClientTests.cs" />
     <Compile Include="Utility\CountDownLatch.cs" />
+    <Compile Include="Utility\ErrorDataReader.cs" />
     <Compile Include="Utility\InMemorySubmissionClient.cs" />
     <Compile Include="Utility\PasswordGenerator.cs" />
     <Compile Include="Utility\RandomEventGenerator.cs" />