pgsql: PL/Python: Adjust the regression tests for Python 3.3

PL/Python: Adjust the regression tests for Python 3.3

The string representation of ImportError changed. Remove printing
that; it's not necessary for the test.

The order in which members of a dict are printed changed. But this
was always implementation-dependent, so we have just been lucky for a
long time. Do the printing the hard way to ensure sorted order.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/2cfb1c6f77734db81b6e74bcae630f93b94f69be

Modified Files
--------------
src/pl/plpython/expected/plpython_import.out | 5 +----
src/pl/plpython/expected/plpython_params.out | 17 ++++++++++++-----
src/pl/plpython/expected/plpython_trigger.out | 10 ++++++++--
src/pl/plpython/sql/plpython_import.sql | 3 +--
src/pl/plpython/sql/plpython_params.sql | 9 ++++++++-
src/pl/plpython/sql/plpython_trigger.sql | 10 ++++++++--
6 files changed, 38 insertions(+), 16 deletions(-)