Feature/serialization exe (#442)

* Initial changes to have serialization generate its own .exe

* Removed additional project from sln file

* remove all references to removed temporary project

* Moved shared contracts into own dll and fixed imports. Addressed PR comments

* Undid having a separate contracts project since that'll be a task for later on. Moved dbcellvalue and saveresultsrequest to Hosting, where they will be imported and shared by the service layer and serialization projects

* Switched backslashes in project reference in csproj file to forward slashes for consistency

* Moved necessary contracts back to service layer. Refactored CommandOptions to reduce code duplication. Addressed miscellaneous PR suggestions

* Accidentally left these files out of previous commit

* Initialized loggers for serialization and credentials with the logging directory provided by the cmd line arg, if there is one

* Changed default log directory paths for serialization and credentials. Removed unnecessary cast and added a copyright

* Changed name of generated executable for serialization service

* removed unnecessary object cast

* removing unnecessary imports and addressing other PR comments

src/Microsoft.SqlTools.ServiceLayer/Utility/ServiceLayerCommandOptions.cs

@@ -0,0 +1,36 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System.Globalization;
+using Microsoft.SqlTools.Hosting.Utility;
+
+namespace Microsoft.SqlTools.ServiceLayer.Utility
+{
+    class ServiceLayerCommandOptions : CommandOptions
+    {
+        private const string ServiceLayerServiceName = "MicrosoftSqlToolsServiceLayer.exe";
+
+        public ServiceLayerCommandOptions(string[] args) : base(args, ServiceLayerServiceName)
+        {
+        }
+
+        public override void SetLocale(string locale)
+        {
+            try
+            {
+                LocaleSetter(locale);
+
+                // Setting our internal SR culture to our global culture
+                SR.Culture = CultureInfo.CurrentCulture;
+            }
+            catch (CultureNotFoundException)
+            {
+                // Ignore CultureNotFoundException since it only is thrown before Windows 10.  Windows 10,
+                // along with macOS and Linux, pick up the default culture if an invalid locale is passed
+                // into the CultureInfo constructor.
+            }
+        }
+
+    }
+}