pgsql: Make pg_upgrade's test.sh less chatty.

Make pg_upgrade's test.sh less chatty.

Remove "set -x", and pass "-A trust" to initdb explicitly,
to suppress almost all of the noise this script used to emit
on stderr.

This back-patches commit eb9812f27 into out-of-support branches,
pursuant to newly-established project policy. The point is to
suppress useless noise on stderr when running check-world.

Discussion: /messages/by-id/d0316012-ece7-7b7e-2d36-9c38cb77cb3b@enterprisedb.com

Branch
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REL9_2_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/a4061eeaf34a06fa1c05e28bfc9e984a14bb1073

Modified Files
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contrib/pg_upgrade/test.sh | 10 ++--------
1 file changed, 2 insertions(+), 8 deletions(-)