Force UTC usage.

PayZen interface expectes all dates in UTC, but suds library is not configurable.
So force UTC usage while importing and using suds, so no date mangling will happen.

Conflicts:
	bt5/erp5_payzen_secure_payment/bt/revision

bt5/erp5_payzen_secure_payment/DocumentTemplateItem/portal_components/document.erp5.PayzenService.py

@@ -6,14 +6,42 @@ from Products.ERP5Type.Document import newTempDocument
 import hashlib
 from zLOG import LOG, WARNING
 import datetime
+import os
+import time
 from Products.DCWorkflow.DCWorkflow import ValidationFailed
 
+present = False
+tz = None
+if 'TZ' in os.environ:
+  present = True
+  tz = os.environ['TZ']
+os.environ['TZ'] = 'UTC'
+time.tzset()
 try:
   import suds
 except ImportError:
   class PayzenSOAP:
     pass
 else:
+  def setUTCTimeZone(fn):
+    def wrapped(*args, **kwargs):
+      present = False
+      tz = None
+      if 'TZ' in os.environ:
+        present = True
+        tz = os.environ['TZ']
+      os.environ['TZ'] = 'UTC'
+      time.tzset()
+      try:
+        return fn(*args, **kwargs)
+      finally:
+        if present:
+          os.environ['TZ'] = tz
+        else:
+          del(os.environ['TZ'])
+        time.tzset()
+    return wrapped
+      
   class PayzenSOAP:
     """SOAP communication
 
@@ -49,6 +77,7 @@ else:
       signature = self._getSignature(data, received_sorted_keys)
       return signature == data.signature
 
+    @setUTCTimeZone
     def soap_getInfo(self, transmissionDate, transactionId):
       """Returns getInfo as dict, booelan, string, string
 
@@ -107,6 +136,7 @@ else:
 
       return [data_kw, signature, last_sent, last_received]
 
+    @setUTCTimeZone
     def soap_duplicate(self, transmissionDate, transactionId, presentationDate,
       newTransactionId, amount, devise, orderId='', orderInfo='', orderInfo2='',
       orderInfo3='', validationMode=0, comment=''):
@@ -168,6 +198,7 @@ else:
 
       return [data_kw, signature, last_sent, last_received]
 
+    @setUTCTimeZone
     def soap_cancel(self, transmissionDate, transactionId, comment=''):
       # prepare with passed parameters
       kw = dict(transmissionDate=transmissionDate, transactionId=transactionId,
@@ -221,6 +252,12 @@ else:
         signature = False
 
       return [data_kw, signature, last_sent, last_received]
+finally:
+  if present:
+    os.environ['TZ'] = tz
+  else:
+    del(os.environ['TZ'])
+  time.tzset()
 
 class PayzenService(XMLObject, PayzenSOAP):
   meta_type = 'Payzen Service'