Add ability to create sessions from templates, and list existing sessions (#671)

* Initial changes to connect to existing sessions

* Creating new profiler sessions

* Some session template changes

* Fixing errors

* Cleaning up comments, string constants, and formatting

* Removing commented code

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

@@ -0,0 +1,56 @@
+//
+// 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;
+
+namespace Microsoft.SqlTools.ServiceLayer.Profiler.Contracts
+{
+    /// <summary>
+    /// Class that contains data for a single profile event
+    /// </summary>
+    public class ProfilerSessionTemplate
+    {
+        /// <summary>
+        /// Initialize a new ProfilerEvent with required parameters
+        /// </summary>
+        public ProfilerSessionTemplate(string name, string defaultView, string createStatement)
+        {
+            this.Name = name;
+            this.DefaultView = defaultView;
+            this.CreateStatement = createStatement;
+        }
+
+        /// <summary>
+        /// Profiler event name
+        /// </summary>
+        public string Name { get; private set; }
+
+        /// <summary>
+        /// Profiler event timestamp
+        /// </summary>
+        public string DefaultView { get; private set; }
+
+        /// <summary>
+        /// Profiler event timestamp
+        /// </summary>
+        public string CreateStatement { get; private set; }
+
+        /// <summary>
+        /// Equals method
+        /// </summary>
+        public bool Equals(ProfilerSessionTemplate t)
+        {
+            // if parameter is null return false:
+            if ((object)t == null)
+            {
+                return false;
+            }
+
+            return this.Name == t.Name
+                && this.DefaultView == t.DefaultView
+                && this.CreateStatement == t.CreateStatement;
+        }
+    }
+}