Snappy unit tests fail on .net Core

[vchekan]

#dotnetcore

On linux with .net core 2.0.2 installed, run build.sh.
Build will succeed, but unit tests will fail with message:

    /home/vadim/projects/kafunk/tests/kafunk.Tests/bin/Release/Kafunk.Tests.dll


Errors, Failures and Warnings

1) Error : CompressionTests.Compression.Snappy reads messages that are compatible with reference implementation
System.TypeInitializationException : The type initializer for 'Snappy.NativeProxy' threw an exception.
  ----> System.DllNotFoundException : kernel32

Investigation shows that Snappy.NET is packaged with 32 and 64 versions of snappy.dll in order to dynamically load appropriate library and avoid native dependency management. Windows kernel32:LoadLibrary function is used, which fails on windows.
https://bitbucket.org/robertvazan/snappy.net/src/ffa7e8165ae7e2ec5e8384b21a9b406ad972c3f1/Snappy.NET/NativeProxy.cs?at=default&fileviewer=file-view-default#NativeProxy.cs-49

It should be easy to detect non-windows environment and load "snappy.so" on linux.
I'll try to fix Snappy.NET and will sent patch upstream.

[eulerfx]

Sounds good, thanks!