pgsql: Add expected regress output on stricter isolation levels

Add expected regress output on stricter isolation levels

These new files allow the new FK tests on isolationtester to pass on the
serializable and repeatable read isolation levels (which are untested
by the buildfarm).

Author: Kevin Grittner
Reviewed by Noah Misch

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/a0eae1a2eeb6c0e9deffeccad2f9921d8e561fb5

Modified Files
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src/test/isolation/expected/fk-deadlock2_1.out |  110 ++++++++++++++++++++++++
src/test/isolation/expected/fk-deadlock2_2.out |  110 ++++++++++++++++++++++++
src/test/isolation/expected/fk-deadlock_1.out  |   71 +++++++++++++++
3 files changed, 291 insertions(+), 0 deletions(-)