Remove all non-external networks on down.

Also moves the shutdown test fixtures to be a more general v2-full fixture.

Signed-off-by: Daniel Nephin <dnephin@docker.com>

compose/network.py

@@ -65,7 +65,10 @@ class Network(object):
             )
 
     def remove(self):
-        # TODO: don't remove external networks
+        if self.external_name:
+            log.info("Network %s is external, skipping", self.full_name)
+            return
+
         log.info("Removing network {}".format(self.full_name))
         self.client.remove_network(self.full_name)
 

compose/project.py

@@ -275,7 +275,7 @@ class Project(object):
     def down(self, remove_image_type, include_volumes):
         self.stop()
         self.remove_stopped(v=include_volumes)
-        self.remove_default_network()
+        self.remove_networks()
 
         if include_volumes:
             self.remove_volumes()
@@ -286,11 +286,11 @@ class Project(object):
         for service in self.get_services():
             service.remove_image(remove_image_type)
 
-    def remove_default_network(self):
+    def remove_networks(self):
         if not self.use_networking:
             return
-        if self.uses_default_network():
-            self.default_network.remove()
+        for network in self.networks:
+            network.remove()
 
     def remove_volumes(self):
         for volume in self.volumes: