Rename unused loop iterators

Author: akx

test/helpers/infra_helpers.py

@@ -27,7 +27,7 @@ def firewall_test(manager, firewall_rules, server):
     fs = server.get_firewall_rules()
     assert len(fs) == 2
 
-    for f in fs:
+    for _ in fs:
         manager.delete_firewall_rule(server.uuid, 1)
 
     fs = server.get_firewall_rules()

test/test_tags.py

@@ -49,7 +49,7 @@ def test_get_tags(self, manager):
     @responses.activate
     def test_create_new_tag(self, manager):
 
-        for i in range(1, 4):
+        for _ in range(1, 4):
             responses.add_callback(
                 responses.POST,
                 Mock.base_url + '/tag',