Mop-up for commit feb8254518752b2cb4a8964c374dd82d49ef0e0d.

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

Commit: da616950cee395919f835b5cbec3d23c4844015a
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2018-03-25T03:44:22Z
Releases: 11.0
Mop-up for commit feb8254518752b2cb4a8964c374dd82d49ef0e0d.

Missed these occurrences of some of the adjusted error messages.
Per buildfarm member pademelon.

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