Add v2 of the Hosting Service and build nuget packages for it (#675)

* Port v2 of Hosting service to SqlToolsService
- Renamed project to .v2 so that existing hosted service isn't impacted
- Copied over the CoreServices project which contains ConnectionServiceCore and other reusable services for anything interacting with MSSQL
- Ported unit test project across and verified tests run.

* Nuget package support for reusable DLLs

* Use 1.1 version per Karl's suggestion

* Use correct license URL and project URL

* Use new SMO packages

src/Microsoft.SqlTools.CoreServices/LanguageServices/TelemetryNotification.cs

@@ -0,0 +1,100 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using System.Collections.Generic;
+using Microsoft.SqlTools.Hosting.Contracts;
+
+namespace Microsoft.SqlTools.CoreServices.LanguageServices.Contracts
+{
+    public class TelemetryProperties
+    {
+        public string EventName { get; set; }
+
+        /// <summary>
+        /// Telemetry properties
+        /// </summary>
+        public Dictionary<string, string> Properties { get; set; }
+
+        /// <summary>
+        /// Telemetry measures
+        /// </summary>
+        public Dictionary<string, double> Measures { get; set; }
+    }
+
+    /// <summary>
+    /// Parameters sent back with an IntelliSense ready event
+    /// </summary>
+    public class TelemetryParams
+    {
+        public TelemetryProperties Params { get; set; }
+    }
+
+    /// <summary>
+    /// Event sent when the language service needs to add a telemetry event
+    /// </summary>
+    public class TelemetryNotification
+    {
+        public static readonly
+            EventType<TelemetryParams> Type =
+            EventType<TelemetryParams>.Create("telemetry/sqlevent");
+    }
+
+    /// <summary>
+    /// List of telemetry events
+    /// </summary>
+    public static class TelemetryEventNames
+    {
+        /// <summary>
+        /// telemetry event name for auto complete response time
+        /// </summary>
+        public const string IntellisenseQuantile = "IntellisenseQuantile";
+
+        /// <summary>
+        /// telemetry event name for when definition is requested
+        /// </summary>
+        public const string PeekDefinitionRequested = "PeekDefinitionRequested";
+
+        /// <summary>
+        /// telemetry event name for when definition is requested
+        /// </summary>
+        public const string FormatCode = "FormatCode";
+    }
+
+    /// <summary>
+    ///  List of properties used in telemetry events
+    /// </summary>
+    public static class TelemetryPropertyNames
+    {
+        /// <summary>
+        /// Is a connection to an Azure database or not
+        /// </summary>
+        public const string IsAzure = "IsAzure";
+
+        /// <summary>
+        /// Did an event succeed or not
+        /// </summary>
+        public const string Succeeded = "Succeeded";
+
+        /// <summary>
+        /// Was the action against a connected file or similar resource, or not
+        /// </summary>
+        public const string Connected = "Connected";
+
+        /// <summary>
+        /// Format type property - should be one of <see cref="DocumentFormatType"/> or <see cref="RangeFormatType"/>
+        /// </summary>
+        public const string FormatType = "FormatType";
+
+        /// <summary>
+        /// A full document format
+        /// </summary>
+        public const string DocumentFormatType = "Document";
+
+        /// <summary>
+        /// A document range format
+        /// </summary>
+        public const string RangeFormatType = "Range";
+    }
+}