Adding sr.strings file and removing hard-coded strings (#52)

* Strings sweep for connection service

* String sweep for credentials service

* String sweep for hosting

* String sweep for query execution service

* String sweep for Workspace service

* Renaming utility namespace to match standards

Renaming Microsoft.SqlTools.EditorServices.Utility to
Microsoft.SqlTools.ServiceLayer.Utility to match the naming changes done a
while back. Also renaming them on the files that use them

* Namespace change on reliable connection

* Adding the new resx and designer files

* Final bug fixes for srgen

Fixing flakey moq package name

* Removing todo as per @kevcunnane

* Adding using statements as per @llali's comment

* Fixing issues from broken unit tests

Note: This feature contains changes that will break the contract for
saving as CSV and JSON. On success, null is returned as a message instead
of "Success". Changes will be made to the vscode component to handle this
change.

build.cake

@@ -526,7 +526,7 @@ Task("SRGen")
 		}
 
 		// Run SRGen
-		var dotnetArgs = string.Format("{0} -or \"{1}\" -oc \"{2}\" -ns \"{3}\" -an \"{4}\" -cn SR -l CS \"{5}\"",
+		var dotnetArgs = string.Format("{0} -or \"{1}\" -oc \"{2}\" -ns \"{3}\" -an \"{4}\" -cn SR -l CS -dnx \"{5}\"",
 			srgenPath, outputResx, outputCs, projectName, projectName, projectStrings);
 		Information("{0}", dotnetArgs);
 		Run(dotnetcli, dotnetArgs);