hstore_plpython: Support tests on Python 2.3

Python 2.3 does not have the sorted() function, so do it the long way.

contrib/hstore_plpython/expected/hstore_plpython.out

@@ -6,7 +6,9 @@ LANGUAGE plpythonu
 TRANSFORM FOR TYPE hstore
 AS $$
 assert isinstance(val, dict)
-plpy.info(sorted(val.items()))
+i = val.items()
+i.sort()
+plpy.info(i)
 return len(val)
 $$;
 SELECT test1('aa=>bb, cc=>NULL'::hstore);
@@ -23,7 +25,9 @@ LANGUAGE plpython2u
 TRANSFORM FOR TYPE hstore
 AS $$
 assert isinstance(val, dict)
-plpy.info(sorted(val.items()))
+i = val.items()
+i.sort()
+plpy.info(i)
 return len(val)
 $$;
 SELECT test1n('aa=>bb, cc=>NULL'::hstore);

contrib/hstore_plpython/sql/hstore_plpython.sql

@@ -8,7 +8,9 @@ LANGUAGE plpythonu
 TRANSFORM FOR TYPE hstore
 AS $$
 assert isinstance(val, dict)
-plpy.info(sorted(val.items()))
+i = val.items()
+i.sort()
+plpy.info(i)
 return len(val)
 $$;
 
@@ -21,7 +23,9 @@ LANGUAGE plpython2u
 TRANSFORM FOR TYPE hstore
 AS $$
 assert isinstance(val, dict)
-plpy.info(sorted(val.items()))
+i = val.items()
+i.sort()
+plpy.info(i)
 return len(val)
 $$;