Revert "Revmoed app.config from commands.sql.test"

This reverts commit f6f6c07.

Author: caln-microsoft

src/ResourceManager/Sql/Commands.Sql.Test/Commands.Sql.Test.csproj

@@ -152,6 +152,7 @@
     <Compile Include="ScenarioTests\DatabaseActivationTests.cs" />
     <Compile Include="ScenarioTests\DatabaseCrudTests.cs" />
     <Compile Include="ScenarioTests\DataMaskingTests.cs" />
+    <None Include="app.config" />
     <None Include="ScenarioTests\DatabaseActivationTests.ps1">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>