Make routers_client use **kwargs

As we discussed on http://lists.openstack.org/pipermail/openstack-dev/2015-July/068864.html
All http POST/PUT methods need to contain **kwargs as their arguments.
This patch makes routers_client use **kwargs.

Partially implements blueprint consistent-service-method-names

Change-Id: I2db862191cc30bcf903098d2959b9b22b16c153b
diff --git a/tempest/api/network/test_routers.py b/tempest/api/network/test_routers.py
index 01afc51..11f7fc6 100644
--- a/tempest/api/network/test_routers.py
+++ b/tempest/api/network/test_routers.py
@@ -53,7 +53,7 @@
         # as we need to check the response code
         name = data_utils.rand_name('router-')
         create_body = self.routers_client.create_router(
-            name, external_gateway_info={
+            name=name, external_gateway_info={
                 "network_id": CONF.network.public_network_id},
             admin_state_up=False)
         self.addCleanup(self._delete_router, create_body['router']['id'])
@@ -97,7 +97,7 @@
 
         name = data_utils.rand_name('router-')
         create_body = self.admin_routers_client.create_router(
-            name, tenant_id=project_id)
+            name=name, tenant_id=project_id)
         self.addCleanup(self.admin_routers_client.delete_router,
                         create_body['router']['id'])
         self.assertEqual(project_id, create_body['router']['tenant_id'])
@@ -124,7 +124,7 @@
                 'network_id': CONF.network.public_network_id,
                 'enable_snat': enable_snat}
             create_body = self.admin_routers_client.create_router(
-                name, external_gateway_info=external_gateway_info)
+                name=name, external_gateway_info=external_gateway_info)
             self.addCleanup(self.admin_routers_client.delete_router,
                             create_body['router']['id'])
             # Verify snat attributes after router creation
@@ -389,7 +389,7 @@
     def test_create_distributed_router(self):
         name = data_utils.rand_name('router')
         create_body = self.admin_routers_client.create_router(
-            name, distributed=True)
+            name=name, distributed=True)
         self.addCleanup(self._delete_router,
                         create_body['router']['id'],
                         self.admin_routers_client)