Fix cleanse_wwn for unicode

str.translate() supports 2-args but unicode.translate doesn't.

Signed-off-by: Andy Grover <agrover@redhat.com>
Fix up unvalid NAA values

Old versions of rtslib generated NAA values that started with '6'. 6 means
a 128-bit NAA, but we use 64 bit NAAs, which should be prefixed by '5'.

Since we're strict about NAA checking, reloading from old '6' savefiles
would fail. Instead, convert to the proper prefix and continue.

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