Fixing up error logging

Fixing issue where plaintext passwords could be written to logs
Fixing up todo issues where error events needed to be passed back from the
service layer when the hosting component fails.

src/Microsoft.SqlTools.ServiceLayer/Hosting/Contracts/HostingErrorEvent.cs

@@ -0,0 +1,28 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using Microsoft.SqlTools.ServiceLayer.Hosting.Protocol.Contracts;
+
+namespace Microsoft.SqlTools.ServiceLayer.Hosting.Contracts
+{
+    /// <summary>
+    /// Parameters to be used for reporting hosting-level errors, such as protocol violations
+    /// </summary>
+    public class HostingErrorParams
+    {
+        /// <summary>
+        /// 
+        /// </summary>
+        public string Message { get; set; }
+    }
+
+    public class HostingErrorEvent
+    {
+        public static readonly 
+            EventType<HostingErrorParams> Type =
+            EventType<HostingErrorParams>.Create("hostingError");
+
+    }
+}

src/Microsoft.SqlTools.ServiceLayer/Hosting/Protocol/MessageDispatcher.cs

@@ -243,6 +243,11 @@ namespace Microsoft.SqlTools.ServiceLayer.Hosting.Protocol
                 // previous message.  In this case, do not try to dispatch it.
                 if (newMessage != null)
                 {
+                    // Verbose logging
+                    string logMessage = String.Format("Received message of type[{0}] and method[{1}]",
+                        newMessage.MessageType, newMessage.Method);
+                    Logger.Write(LogLevel.Verbose, logMessage);
+
                     // Process the message
                     await this.DispatchMessage(newMessage, this.MessageWriter);
                 }

src/Microsoft.SqlTools.ServiceLayer/Hosting/Protocol/MessageReader.cs

@@ -112,13 +112,6 @@ namespace Microsoft.SqlTools.ServiceLayer.Hosting.Protocol
             // Get the JObject for the JSON content
             JObject messageObject = JObject.Parse(messageContent);
 
-            // Load the message
-            Logger.Write(
-                LogLevel.Verbose,
-                string.Format(
-                    "READ MESSAGE:\r\n\r\n{0}",
-                    messageObject.ToString(Formatting.Indented)));
-
             // Return the parsed message
             return this.messageSerializer.DeserializeMessage(messageObject);
         }

test/Microsoft.SqlTools.ServiceLayer.Test/Messaging/TestMessageTypes.cs

@@ -6,7 +6,7 @@
 using System.Threading.Tasks;
 using Microsoft.SqlTools.ServiceLayer.Hosting.Protocol;
 
-namespace Microsoft.SqlTools.ServiceLayer.Test.Message
+namespace Microsoft.SqlTools.ServiceLayer.Test.Messaging
 {
     #region Request Types