Adjust PL/Python regression tests some more for Python 3.3.

Commit 2cfb1c6f77 fixed some issues caused
by Python 3.3 choosing to iterate through dict entries in a different order
than before.  But here's another one: the test cases adjusted here made two
bad entries in a dict and expected the one complained of would always be
the same.

Possibly this should be back-patched further than 9.2, but there seems
little point unless the earlier fix is too.

src/pl/plpython/expected/plpython_trigger.out

@@ -476,7 +476,7 @@ DROP TRIGGER stupid_trigger6 ON trigger_test;
 -- TD keys not corresponding to row columns
 CREATE FUNCTION stupid7() RETURNS trigger
 AS $$
-    TD["new"] = {'a': 'foo', 'b': 'bar'}
+    TD["new"] = {'v': 'foo', 'a': 'bar'}
     return "MODIFY";
 $$ LANGUAGE plpythonu;
 CREATE TRIGGER stupid_trigger7
@@ -490,7 +490,7 @@ DROP TRIGGER stupid_trigger7 ON trigger_test;
 -- Unicode variant
 CREATE FUNCTION stupid7u() RETURNS trigger
 AS $$
-    TD["new"] = {u'a': 'foo', u'b': 'bar'}
+    TD["new"] = {u'v': 'foo', u'a': 'bar'}
     return "MODIFY"
 $$ LANGUAGE plpythonu;
 CREATE TRIGGER stupid_trigger7

src/pl/plpython/sql/plpython_trigger.sql

@@ -253,7 +253,7 @@ DROP TRIGGER stupid_trigger6 ON trigger_test;
 
 CREATE FUNCTION stupid7() RETURNS trigger
 AS $$
-    TD["new"] = {'a': 'foo', 'b': 'bar'}
+    TD["new"] = {'v': 'foo', 'a': 'bar'}
     return "MODIFY";
 $$ LANGUAGE plpythonu;
 
@@ -270,7 +270,7 @@ DROP TRIGGER stupid_trigger7 ON trigger_test;
 
 CREATE FUNCTION stupid7u() RETURNS trigger
 AS $$
-    TD["new"] = {u'a': 'foo', u'b': 'bar'}
+    TD["new"] = {u'v': 'foo', u'a': 'bar'}
     return "MODIFY"
 $$ LANGUAGE plpythonu;