The recent stable update changed output for calls to
repack.repack_indexdef with the third arg being NULL.
Output gets an additional "TABLESPACE pg_default". So add
another variant of expected output to cover 9.6.2, 9.5.6,
9.4.11 and 9.3.16.
Stable update at https://www.postgresql.org/about/news/1733/
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>