Prevent platform-dependent output row ordering in a new test query.

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

Commit: 5d0e8bc9e036bffb88b7598aa4d46b7368a10f0c
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2015-07-29T00:00:13Z
Releases: 9.6.0
Prevent platform-dependent output row ordering in a new test query.

Buildfarm indicates this is necessary.

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