Don't log critical message when client disconnect#955

JoeRobich merged 2 commits intoOmniSharp:masterOmniSharp/csharp-language-server-protocol:masterfrom

ycholette:Don't-log-critical-message-when-client-disconnectycholette/csharp-language-server-protocol:Don't-log-critical-message-when-client-disconnectCopy head branch name to clipboard