Turn on tlsv1 since the .NET framework requires it
Turn on tlsv1 since the .NET framework requires it


Former-commit-id: daa33d15e4259acd706ed70ad8b903bc97e43eac
rob-somerville/riak-dotnet-client,basho/riak-dotnet-client,basho/riak-dotnet-client,rob-somerville/riak-dotnet-client