Alter text test arg to obey new rule, also include inverse test to make time-zone independant

Lib/test/test_imaplib.py

 import imaplib
 import time
 
-# We can check only that it successfully produces a result,
-# not the correctness of the result itself, since the result
-# depends on the timezone the machine is in.
-
 timevalues = [2000000000, 2000000000.0, time.localtime(2000000000),
-              "18-May-2033 05:33:20 +0200"]
+              '"18-May-2033 05:33:20 +0200"', '"18-May-2033 13:33:20 +1000"']
+
+check = timevalues[2]
 
 for t in timevalues:
-    imaplib.Time2Internaldate(t)
+    if check <> imaplib.Internaldate2tuple('INTERNALDATE ' + imaplib.Time2Internaldate(t)):
+        print 'incorrect result when converting', `t`