Task/script refactor (#446)

* scripting working with race conditions

* new service works with no race conditions

* use new scripting service and commented out tests

* refactored peek definition to use mssql-scripter

* fixed peek definition tests

* removed auto gen comment

* fixed peek definition highlighting bug

* made scripting async and fixed event handlers

* fixed tests (without cancel and plan notifs)

* removed dead code

* added nuget package

* CR comments + select script service implementation

* minor fixes and added test

* CR comments and script select

* added unit tests

* code review comments and cleanup

src/Microsoft.SqlTools.ServiceLayer/Scripting/Contracts/ScriptingRequest.cs

@@ -67,6 +67,12 @@ namespace Microsoft.SqlTools.ServiceLayer.Scripting.Contracts
         /// Gets or sets the scripting options.
         /// </summary>
         public ScriptOptions ScriptOptions { get; set; }
+
+        /// <summary>
+        /// Gets or sets the connection owner URI
+        /// </summary>
+        public string OwnerUri { get; set; }
+
     }
 
     /// <summary>
@@ -75,6 +81,8 @@ namespace Microsoft.SqlTools.ServiceLayer.Scripting.Contracts
     public class ScriptingResult
     {
         public string OperationId { get; set; }
+
+        public string Script { get; set; }
     }
 
     /// <summary>