Path used for inline task reference is not honored

[Sarabeth-Jaffe-Microsoft]

The path specified in a reference is respected during compilation, but not during execution.

Repro Steps: Create an inline task, add a reference to a non-standard assembly and attempt to use it in a code fragment.

This bug has also been reported on StackOverflow.

Code that reproduces the error:

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="14.0" DefaultTargets="TestBuild" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <UsingTask TaskName="Hello" TaskFactory="CodeTaskFactory" AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.Core.dll" >
    <ParameterGroup />
    <Task>
      <Reference Include="$(MSBuildExtensionsPath)\Microsoft\VisualStudio\v14.0\Web\Microsoft.Web.XmlTransform.dll"/>
      <Reference Include="System.Xml" />
      <Code Type="Fragment" Language="cs">
        <![CDATA[
          var f = new Microsoft.Web.XmlTransform.XmlTransformationException("test");
          Log.LogMessage("test: " + f.Message);  
        ]]>
      </Code>
    </Task>
  </UsingTask>
  <Target Name="TestBuild">
    <Hello />
  </Target>
</Project>

[nigelgbanks]

This is still an issue if using RoslynCodeTaskFactory.
error MSB4018: System.IO.FileNotFoundException: Could not load file or assembly

But it does work with CodeTaskFactory.