FLUID-5474: No longer removing tocTemplate option

Distribute options had been moving the tocTemplate option, as opposed to copying it. The result of which was that the iframeEnhancer was looking for the option in a place it had been removed from. Also added tests to verify that the tocTemplate is being passed to the iframeEnhancer.
Merge remote-tracking branch 'justin/FLUID-5474'

* justin/FLUID-5474:
  FLUID-5474: No longer removing tocTemplate option