Reading a pipeline from a .dream3d file incorrectly imports Read DREAM.3D Data File filters

Read DREAM.3D Data File filters are imported as both the filter in question and the entire FilterPipeline stored in the .dream3d file handled by the Read DREAM.3D Data File filter.

This causes issues where all data imported by the Read DREAM.3D Data File filter already exists because the filter is preceded by the pipeline that generated the imported data.