Make a few tweaks based on code review feedback

Author: DustinCampbell

src/omnisharp/server.ts

@@ -411,10 +411,6 @@ export class OmniSharpServer {
             };
 
             this._requestQueue.enqueue(request);
-
-            if (this._getState() === ServerState.Started) {
-                this._requestQueue.drain();
-            }
         });
 
         if (token) {
@@ -528,6 +524,8 @@ export class OmniSharpServer {
         else {
             request.onError(packet.Message || packet.Body);
         }
+
+        this._requestQueue.drain();
     }
 
     private _handleEventPacket(packet: protocol.WireProtocol.EventPacket): void {