Allow providing options when creating networks

Following the spec:

    http://docs.docker.com/engine/reference/api/docker_remote_api_v1.21/#create-a-network

I have added an Options argument to create_network.

This opens up the possibility of creating isolated containers with no
internet access programmatically. We require such facilities in
https://github.com/jupyter/tmpnb/issues/187.
Signed-off-by: Sumit Sahrawat <sumit.sahrawat.apm13@iitbhu.ac.in>

docker/api/network.py

@@ -19,10 +19,14 @@ class NetworkApiMixin(object):
         return self._result(res, json=True)
 
     @minimum_version('1.21')
-    def create_network(self, name, driver=None):
+    def create_network(self, name, driver=None, options=None):
+        if options is not None and not isinstance(options, dict):
+            raise TypeError('options must be a dictionary')
+
         data = {
             'name': name,
             'driver': driver,
+            'options': options
         }
         url = self._url("/networks/create")
         res = self._post_json(url, data=data)

tests/unit/network_test.py

@@ -70,11 +70,15 @@ class NetworkTest(DockerClientTest):
                 json.loads(post.call_args[1]['data']),
                 {"name": "foo"})
 
-            self.client.create_network('foo', 'bridge')
+            opts = {
+                'com.docker.network.bridge.enable_icc': False,
+                'com.docker.network.bridge.enable_ip_masquerade': False,
+            }
+            self.client.create_network('foo', 'bridge', opts)
 
             self.assertEqual(
                 json.loads(post.call_args[1]['data']),
-                {"name": "foo", "driver": "bridge"})
+                {"name": "foo", "driver": "bridge", "options": opts})
 
     @base.requires_api_version('1.21')
     def test_remove_network(self):