Fix unstable regression test output.

Tom Lane <tgl@sss.pgh.pa.us>

Commit: 690c543550b0d2852060c18d270cdb534d339d9a
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2016-04-08T18:15:20Z
Releases: 9.6.0
Fix unstable regression test output.

Output order from the pg_indexes view might vary depending on the
phase of the moon, so add ORDER BY to ensure stable results of tests
added by commit 386e3d7609c49505e079c40c65919d99feb82505.
Per buildfarm.

Files