Remove yumcache when cleaning up mock and yum cruft
Remove yumcache when cleaning up mock and yum cruft

quark-pat/CLIP,ykhodorkovskiy/clip,tomhurd/clip,tomhurd/clip,rprevette/clip,quark-pat/CLIP,rprevette/clip,quark-pat/CLIP,rprevette/clip,quark-pat/CLIP,tomhurd/clip,tomhurd/clip,quark-pat/CLIP,tomhurd/clip,ykhodorkovskiy/clip,ykhodorkovskiy/clip,quark-pat/CLIP,tomhurd/clip,rprevette/clip,quark-pat/CLIP,ykhodorkovskiy/clip