Fix source

Author: cheenamalhotra

src/Microsoft.Data.SqlClient/tests/Directory.Packages.props

@@ -1,5 +1,5 @@
 <Project>
-  <Import Project="..\Directory.Packages.props" />
+  <Import Project="..\..\Directory.Packages.props" />
   <!-- Test Project Dependencies for NetFx only -->
   <ItemGroup Condition="$(TargetFramework.StartsWith('net4'))">
     <PackageVersion Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.3" />