Adding pausing functionality for the profiler (#634)

* Dropping profiler session on stop request

* Changes to IXEventSession to simplify dropping sessions

* Stop sessions instead of dropping, disable flaky tests

* Initial framework for profiler pause requests

* Restructuring profiler session monitoring

* Fixes to session monitor

* Testing for pause functionality

* Fixing comments from PR

* Changes to testing

* Commenting out flaky test

* Deleting leftover testing code

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

@@ -0,0 +1,34 @@
+//
+// 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;
+using Microsoft.SqlTools.Utility;
+
+namespace Microsoft.SqlTools.ServiceLayer.Profiler.Contracts
+{
+    /// <summary>
+    /// Pause Profiling request parameters
+    /// </summary>
+    public class PauseProfilingParams : GeneralRequestDetails
+    {
+        public string OwnerUri { get; set; }
+    }
+
+    public class PauseProfilingResult{}
+
+    /// <summary>
+    /// Pause Profile request type
+    /// </summary>
+    public class PauseProfilingRequest
+    {
+        /// <summary>
+        /// Request definition
+        /// </summary>
+        public static readonly
+            RequestType<PauseProfilingParams, PauseProfilingResult> Type =
+            RequestType<PauseProfilingParams, PauseProfilingResult>.Create("profiler/pause");
+    }
+}

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

@@ -16,12 +16,7 @@ namespace Microsoft.SqlTools.ServiceLayer.Profiler.Contracts
         public string OwnerUri { get; set; }
     }
 
-    public class StopProfilingResult
-    {
-        public bool Succeeded { get; set; }
-
-        public string ErrorMessage { get; set; }
-    }
+    public class StopProfilingResult{}
 
     /// <summary>
     /// Start Profile request type