pgsql: postgres_fdw: Attmempt to stabilize regression tests.

postgres_fdw: Attmempt to stabilize regression tests.

Even after commit 882ea509fe7a4711fe25463427a33262b873dfa1, some
buildfarm members are still failing in the postgres_fdw tests.
Try to fix that by disabling use of remote statistics for some
test cases.

Etsuro Fujita

Discussion: http://postgr.es/m/5A7D76CF.8080601@lab.ntt.co.jp

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/958e20e42d6c346ab89f6c72e4262230161d1663

Modified Files
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contrib/postgres_fdw/expected/postgres_fdw.out | 43 +++++++++++++++-----------
contrib/postgres_fdw/sql/postgres_fdw.sql      |  9 ++++++
2 files changed, 34 insertions(+), 18 deletions(-)