pgsql: Avoid using platform-dependent floats in test case.

Avoid using platform-dependent floats in test case.

The number of decimals printed for floats varied in this test case, as
noted by several buildfarm members. There's nothing special about floats
and arrays in the code being tested, so replace the floats with numerics to
make the output platform-independent.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/73c8e8506cd1933ccf5c5d61088ca171a5f414c0

Modified Files
--------------
src/pl/plpython/expected/plpython_types.out   | 19 ++++---------------
src/pl/plpython/expected/plpython_types_3.out | 19 ++++---------------
src/pl/plpython/sql/plpython_types.sql        | 11 ++---------
3 files changed, 10 insertions(+), 39 deletions(-)