cherry pick of changeset:   77b2e32a0f52 from edge-p6
cherry pick of changeset:   77b2e32a0f52 from edge-p6

Layered image builds were not showing up in querysets, this fixes the problem
by tagging images during the layered image "builds".

sassoftware/mint,sassoftware/mint,sassoftware/mint,sassoftware/mint,sassoftware/mint