Move managed parser into its own project (test code coverage) (#774)

* Created New ManagedBatchParser project in .NetStandard

* Addressing PR Comments

* Resolve 'No Repository' warning.

* Move batch parser tests to integrations test project

* Fix SLN file

src/Microsoft.SqlTools.ManagedBatchParser/BatchParser/BatchParserAction.cs

@@ -0,0 +1,13 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+namespace Microsoft.SqlTools.ServiceLayer.BatchParser
+{
+    public enum BatchParserAction
+    {
+        Continue = 0,
+        Abort = 1
+    }
+}