Fix project builds

Author: cheenamalhotra

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

@@ -4,7 +4,7 @@
   <ItemGroup Condition="$(TargetFramework.StartsWith('net4'))">
     <PackageVersion Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.3" />
   </ItemGroup>
-  <ItemGroup>
+  <ItemGroup Condition="$(ReferenceType) == 'Package'">
     <PackageVersion Include="Microsoft.Data.SqlClient" Version="$(TestMicrosoftDataSqlClientVersion)" />
   </ItemGroup>
 </Project>