[COMMITTERS] pgsql: Add minimal test for EXPLAIN ANALYZE of parallel query.

Add minimal test for EXPLAIN ANALYZE of parallel query.

This displays the number of workers launched, thus the test is
dependant on configuration to some degree.  We'll see whether that
turns out ot be a problem.

Author: Rafia Sabih
Discussion: https://postgr.es/m/20170331185540.zmsue4ndvqtnayqw@alap3.anarazel.de

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/b2ff37d43cc81348fd8e9d9c5fcc9dfadf790763

Modified Files
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src/test/regress/expected/select_parallel.out | 10 ++++++++++
src/test/regress/sql/select_parallel.sql      |  3 +++
2 files changed, 13 insertions(+)