ISSUE#494. Remove build_samples_projects_denorm because its logic was wrong. Move what it was supposed to do into populate_new_denorms(). Add logic to make sure we aren't adding duplicates.
ISSUE#494. Remove build_samples_projects_denorm because its logic was
wrong. Move what it was supposed to do into populate_new_denorms(). Add
logic to make sure we aren't adding duplicates.

materials-commons/materialscommons.org,materials-commons/materialscommons.org,materials-commons/materialscommons.org,materials-commons/materialscommons.org,materials-commons/materialscommons.org