generic way to support scriptable operations (#438)

* implemented a generic way to support scriptable operations

test/Microsoft.SqlTools.ServiceLayer.IntegrationTests/DisasterRecovery/TaskExecutionModeFlag.cs

@@ -0,0 +1,32 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+
+using System;
+
+namespace Microsoft.SqlTools.ServiceLayer.IntegrationTests.DisasterRecovery
+{
+    [Flags]
+    public enum TaskExecutionModeFlag
+    {
+        None = 0x00,
+
+        /// <summary>
+        /// Execute task
+        /// </summary>
+        Execute = 0x01,
+
+        /// <summary>
+        /// Script task
+        /// </summary>
+        Script = 0x02,
+
+        /// <summary>
+        /// Execute and script task
+        /// Needed for tasks that will show the script when execution completes
+        /// </summary>
+        ExecuteAndScript = Execute | Script
+    }
+}