Use list comprehension in create_bulk_networks

There is no need to pass size of list to create_bulk_networks in
network_client_base since it can be implemented with list comprehension.

Change-Id: I7eb8c7725d9569ad7c2fe853b72a51d10fe65bd1
diff --git a/tempest/api/network/test_networks.py b/tempest/api/network/test_networks.py
index ac3a072..28e1676 100644
--- a/tempest/api/network/test_networks.py
+++ b/tempest/api/network/test_networks.py
@@ -312,7 +312,7 @@
         # Creates 2 networks in one request
         network_names = [data_utils.rand_name('network-'),
                          data_utils.rand_name('network-')]
-        resp, body = self.client.create_bulk_network(2, network_names)
+        resp, body = self.client.create_bulk_network(network_names)
         created_networks = body['networks']
         self.assertEqual('201', resp['status'])
         self.addCleanup(self._delete_networks, created_networks)
diff --git a/tempest/services/network/network_client_base.py b/tempest/services/network/network_client_base.py
index 4ee8302..e29f1b5 100644
--- a/tempest/services/network/network_client_base.py
+++ b/tempest/services/network/network_client_base.py
@@ -174,10 +174,8 @@
         raise AttributeError(name)
 
     # Common methods that are hard to automate
-    def create_bulk_network(self, count, names):
-        network_list = list()
-        for i in range(count):
-            network_list.append({'name': names[i]})
+    def create_bulk_network(self, names):
+        network_list = [{'name': name} for name in names]
         post_data = {'networks': network_list}
         body = self.serialize_list(post_data, "networks", "network")
         uri = self.get_uri("networks")