XEvent Profiler initial event handlers (#456)

* Bump SMO to 140.2.5 to pick-up private XEvent binaries

* Pick up SMO binaries from the build lab

* Add ProfilerService class placeholder

* Update SMO nuget package to include DB Scoped XEvents

* Stage changes

* Stage changes

* Update SMO to use RTM dependencies and remove separate SqlScript package

* Stage changes

* Iterate on profiler service

* Fix post-merge break in localization

* More refactoring

* Continue iterating on profiler

* Add test profiler listener

* Address a couple of the code review feedback

* Fix AppVeyor build break

* Use self-cleaning test file

src/Microsoft.SqlTools.ServiceLayer/Profiler/Contracts/StartProfilingRequest.cs

@@ -0,0 +1,55 @@
+//
+// 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.Hosting.Protocol.Contracts;
+using Microsoft.SqlTools.ServiceLayer.Utility;
+
+namespace Microsoft.SqlTools.ServiceLayer.Profiler.Contracts
+{
+    /// <summary>
+    /// Start Profiling request parameters
+    /// </summary>
+    public class StartProfilingParams : GeneralRequestDetails
+    {
+        public string OwnerUri { get; set; }
+
+        public string TemplateName 
+        {
+            get
+            {
+                return GetOptionValue<string>("templateName");
+            }
+            set
+            {
+                SetOptionValue("templateName", value);
+            }
+        }
+    }
+
+    public class StartProfilingResult
+    {
+        /// <summary>
+        /// Session ID that was started
+        /// </summary>
+        public string SessionId { get; set; }
+
+        public bool Succeeded { get; set; }
+
+        public string ErrorMessage { get; set; }
+    }
+
+    /// <summary>
+    /// Start Profile request type
+    /// </summary>
+    public class StartProfilingRequest
+    {
+        /// <summary>
+        /// Request definition
+        /// </summary>
+        public static readonly
+            RequestType<StartProfilingParams, StartProfilingResult> Type =
+            RequestType<StartProfilingParams, StartProfilingResult>.Create("profiler/start");
+    }
+}