Allow cinder types to be created without be file

3rd party ci tests have not whitelisted errors:
"Not Whitelisted Volume type with name * could not be found."

These are creating noise. Instead of requiring a backend file
for each vendor, remove the if statement and just create the
necessary type for each defined back-end.

Change-Id: Ic88efa20eb53864e4f3d22d3306841797dcd118d
Merge "Allow cinder types to be created without be file"