Use --resource-registry parameter

As of I6d2f44332404fd9cab846df1256a2804dce42d70 you must now pass the
--resource-registry parameter when using tuskar-load-roles.

Change-Id: I1129e9f8d0a5dd337eb546bb13e9fe6100d76339
Load the storage roles in Tuskar if they exist

Change-Id: I2b0775b1da85197edb06c3d7b130a42a8ee68ea9
Associate default images to storage roles

Tuskar UI needs images associated by ID.

Change-Id: I651362df48592b3455007a4cddabff3d52ca055c