Cleaned up error messages for Flavor storage
Cleaned up error messages for Flavor storage

Closes-Bug: 1379897
Change-Id: Ib80b17f107b05b89a283873aa414621dc12d0eea

openstack/poppy,stackforge/poppy,obulpathi/poppy,openstack/poppy,stackforge/poppy,obulpathi/poppy,obulpathi/poppy,stackforge/poppy,openstack/poppy