Do not generate WWNs for fabrics that need specified WWNs
Do not generate WWNs for fabrics that need specified WWNs

Some fabrics need WWNs to match with hardware values, and therefore
cannot be generated.

Signed-off-by: Andy Grover <b7d524d2f5cc5aebadb6b92b08d3ab26911cde33@redhat.com>

JonnyJD/rtslib-fb,mikenawrocki/rtslib-fb,cvubrugier/rtslib-fb,agrover/rtslib-fb,mikenawrocki/rtslib-fb