Fix the broker initialization

feudal/backend/brokers.py

@@ -40,17 +40,6 @@ class RabbitMQInstance:
             or os.path.basename(sys.argv[0]) in ('pytest', 'py.test')
         )
 
-
-    def _init_exchanges(self, channel):
-        # this is no error
-        for exchange in self.exchanges:
-            channel.exchange_declare(
-                exchange=exchange,
-                durable=True,  # so exchange survive a broker restart
-                auto_delete=False,
-                exchange_type='topic',
-            )
-
     @property
     def _params(self):
         # we set NO port here, we use the default (probably 5672)
@@ -64,6 +53,20 @@ class RabbitMQInstance:
             ),
         )
 
+    def __init__(self):
+        # always initialize
+        self.initialize()
+
+    def _init_exchanges(self, channel):
+        # this is no error
+        for exchange in self.exchanges:
+            channel.exchange_declare(
+                exchange=exchange,
+                durable=True,  # so exchange survive a broker restart
+                auto_delete=False,
+                exchange_type='topic',
+            )
+
     def __str__(self):
         return self.host
 
@@ -101,6 +104,7 @@ class RabbitMQInstance:
         # close channel and connection
         connection.close()
 
+
     # PUBLIC API
 
     # called on client registration to make sure the  exchanges exists