Update RPC code from OSLO

Fixes bug 1172922

Change-Id: Ieb5f58fe3d2c879bc71f4241288e48e35ab54366

quantum/openstack/common/rpc/common.py

@@ -276,7 +276,7 @@ def _safe_log(log_func, msg, msg_data):
                 for elem in arg[:-1]:
                     d = d[elem]
                 d[arg[-1]] = '<SANITIZED>'
-            except KeyError, e:
+            except KeyError as e:
                 LOG.info(_('Failed to sanitize %(item)s. Key error %(err)s'),
                          {'item': arg,
                           'err': e})
@@ -419,7 +419,7 @@ class ClientException(Exception):
 def catch_client_exception(exceptions, func, *args, **kwargs):
     try:
         return func(*args, **kwargs)
-    except Exception, e:
+    except Exception as e:
         if type(e) in exceptions:
             raise ClientException()
         else:

quantum/openstack/common/rpc/impl_kombu.py

@@ -176,7 +176,7 @@ class ConsumerBase(object):
         """Cancel the consuming from the queue, if it has started"""
         try:
             self.queue.cancel(self.tag)
-        except KeyError, e:
+        except KeyError as e:
             # NOTE(comstud): Kludge to get around a amqplib bug
             if str(e) != "u'%s'" % self.tag:
                 raise
@@ -520,7 +520,7 @@ class Connection(object):
                 return
             except (IOError, self.connection_errors) as e:
                 pass
-            except Exception, e:
+            except Exception as e:
                 # NOTE(comstud): Unfortunately it's possible for amqplib
                 # to return an error not covered by its transport
                 # connection_errors in the case of a timeout waiting for
@@ -561,10 +561,10 @@ class Connection(object):
         while True:
             try:
                 return method(*args, **kwargs)
-            except (self.connection_errors, socket.timeout, IOError), e:
+            except (self.connection_errors, socket.timeout, IOError) as e:
                 if error_callback:
                     error_callback(e)
-            except Exception, e:
+            except Exception as e:
                 # NOTE(comstud): Unfortunately it's possible for amqplib
                 # to return an error not covered by its transport
                 # connection_errors in the case of a timeout waiting for

quantum/openstack/common/rpc/impl_qpid.py

@@ -331,22 +331,23 @@ class Connection(object):
 
     def reconnect(self):
         """Handles reconnecting and re-establishing sessions and queues"""
-        if self.connection.opened():
-            try:
-                self.connection.close()
-            except qpid_exceptions.ConnectionError:
-                pass
-
         attempt = 0
         delay = 1
         while True:
+            # Close the session if necessary
+            if self.connection.opened():
+                try:
+                    self.connection.close()
+                except qpid_exceptions.ConnectionError:
+                    pass
+
             broker = self.brokers[attempt % len(self.brokers)]
             attempt += 1
 
             try:
                 self.connection_create(broker)
                 self.connection.open()
-            except qpid_exceptions.ConnectionError, e:
+            except qpid_exceptions.ConnectionError as e:
                 msg_dict = dict(e=e, delay=delay)
                 msg = _("Unable to connect to AMQP server: %(e)s. "
                         "Sleeping %(delay)s seconds") % msg_dict