pgsql: Split the plpython regression test into test cases arranged by

Log Message:
-----------
Split the plpython regression test into test cases arranged by topic, instead
of the previous monolithic setup-create-run sequence, that was apparently
inherited from a previous test infrastructure, but makes working with the
tests and adding new ones weird.

Modified Files:
--------------
pgsql/src/pl/plpython:
Makefile (r1.32 -> r1.33)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/Makefile?r1=1.32&r2=1.33)
pgsql/src/pl/plpython/expected:
plpython_error.out (r1.6 -> r1.7)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_error.out?r1=1.6&r2=1.7)
plpython_error_2.out (r1.1 -> r1.2)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_error_2.out?r1=1.1&r2=1.2)
plpython_schema.out (r1.3 -> r1.4)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_schema.out?r1=1.3&r2=1.4)
plpython_test.out (r1.9 -> r1.10)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_test.out?r1=1.9&r2=1.10)
pgsql/src/pl/plpython/sql:
plpython_error.sql (r1.3 -> r1.4)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/sql/plpython_error.sql?r1=1.3&r2=1.4)
plpython_schema.sql (r1.3 -> r1.4)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/sql/plpython_schema.sql?r1=1.3&r2=1.4)
plpython_test.sql (r1.5 -> r1.6)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/sql/plpython_test.sql?r1=1.5&r2=1.6)

Added Files:
-----------
pgsql/src/pl/plpython/expected:
README (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/README?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_global.out (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_global.out?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_import.out (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_import.out?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_newline.out (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_newline.out?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_params.out (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_params.out?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_record.out (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_record.out?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_setof.out (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_setof.out?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_spi.out (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_spi.out?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_trigger.out (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_trigger.out?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_unicode.out (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_unicode.out?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_unicode_2.out (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_unicode_2.out?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_unicode_3.out (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_unicode_3.out?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_void.out (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_void.out?rev=1.1&content-type=text/x-cvsweb-markup)
pgsql/src/pl/plpython/sql:
plpython_global.sql (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/sql/plpython_global.sql?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_import.sql (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/sql/plpython_import.sql?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_newline.sql (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/sql/plpython_newline.sql?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_params.sql (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/sql/plpython_params.sql?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_record.sql (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/sql/plpython_record.sql?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_setof.sql (r1.3)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/sql/plpython_setof.sql?rev=1.3&content-type=text/x-cvsweb-markup)
plpython_spi.sql (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/sql/plpython_spi.sql?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_trigger.sql (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/sql/plpython_trigger.sql?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_unicode.sql (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/sql/plpython_unicode.sql?rev=1.1&content-type=text/x-cvsweb-markup)
plpython_void.sql (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/sql/plpython_void.sql?rev=1.1&content-type=text/x-cvsweb-markup)

Removed Files:
-------------
pgsql/src/pl/plpython/expected:
plpython_error_1.out
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_error_1.out)
plpython_error_3.out
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_error_3.out)
plpython_function.out
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/expected/plpython_function.out)
pgsql/src/pl/plpython/sql:
plpython_function.sql
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/sql/plpython_function.sql)