Fix NLog hint path

Author: ethanhann

IntegrationEngine.Tests/IntegrationEngine.Tests.csproj

@@ -103,7 +103,7 @@
       <HintPath>..\packages\Microsoft.AspNet.WebApi.Core.5.2.3\lib\net45\System.Web.Http.dll</HintPath>
     </Reference>
     <Reference Include="NLog">
-      <HintPath>..\packages\NLog.3.2.0.0\lib\net45\NLog.dll</HintPath>
+      <HintPath>..\packages\NLog.3.1.0.0\lib\net45\NLog.dll</HintPath>
     </Reference>
     <Reference Include="Owin">
       <HintPath>..\packages\Owin.1.0\lib\net40\Owin.dll</HintPath>
@@ -190,4 +190,4 @@
   -->
   <ItemGroup />
   <ItemGroup />
-</Project>
+</Project>