Bug 14981: Remove ethnicity occurrences from sample patrons file

Bug 14981: Remove ethnicity occurrences from sample patrons file

Bug 10020 has removed these columns, the should be removed from the
patron sample file.

Test plan:
Insert the files updated by this patch into a fresh DB, you shouldn't
get any error.

Signed-off-by: Frederic Demians <f.demians@tamil.fr>
  Before applying the patch, I was able to notice the error when loading the
  patron sample SQL file to a DB. With the patch, it's solved.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>