Lower the part-power -- 18 is way higher than is needed for a dev
environment.
Add commands for reduced-redundancy and erasure-coded storage policies.
Related-Change: Ibe46011d8e6a6482d39b3a20ac9c091d9fbc6ef7
Related-Change: I6f11f7a1bdaa6f3defb3baa56a820050e5f727f1
Related-Change: I0403016a4bb7dad9535891632753b0e5e9d402eb
Change-Id: I13de27674c81977c2470d43bbb2126ecc4bdd85a