Disregard bug on distinct and limit regression test failures

Gianni Mariani <marianig@cwix.com>

From: Gianni Mariani <marianig@cwix.com>
To: pgsql-bugs@postgreSQL.org
Date: 1999-06-21T05:57:36Z
Lists: pgsql-bugs
It turns out that the copy failure (a permissions problem) caused the
test to fail.

BTW - excellent work on 6.5.