pgsql: Avoid row-processing-order dependency in postgres_fdw regression

Avoid row-processing-order dependency in postgres_fdw regression test.

A test intended to provoke an error on the remote side was coded in such
a way that multiple rows should be updated, so the output would vary
depending on which one was processed first.  Per buildfarm.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/0247d43dd9c4ba3d2e121f98e3d5adcf769ab1e3

Modified Files
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contrib/postgres_fdw/expected/postgres_fdw.out |    2 +-
contrib/postgres_fdw/sql/postgres_fdw.sql      |    2 +-
2 files changed, 2 insertions(+), 2 deletions(-)