Changing test projects to UnitTests, fixing peek definition codegen bug (#269)

src/Microsoft.SqlTools.ServiceLayer/LanguageServices/PeekDefinitionScripts.cs

@@ -2,6 +2,9 @@
 // Copyright (c) Microsoft. All rights reserved.
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 //
+// THIS FILE IS GENERATED BY A CODEGEN TOOL. DO NOT EDIT!!!!
+// IF YOU NEED TO MAKE CHANGES, EDIT THE .TT FILE!!!
+
 using System;
 using System.IO;
 using System.Collections.Generic;