Tests of duplicate cursors in test_cursor01.py fail when run on tiered tables using the tiered hook.

Running:

python3 ../test/suite/run.py --hook tiered cursor01

produces several failures. The problem appears to be the following test code (similar code appears two places in the test):

dupc = self.session.open_cursor(None, cursor, None)
self.assertEquals(cursor.compare(dupc), 0)

WT_CURSOR::compare fails with the following message:

WT_CURSOR.compare: __curfile_compare, 37: Cursors must reference the same object: Invalid argument