Support scenarios for updating neutron quotas

* Add new scenario Quotas.neutron_update to exercise updating
  quotas for neutron
* Modify _update_quotas to be able to support clients which
  update quotas with an api different from nova and cinder
* Add test for ZaqarQueues list()

Co-Authored-By: Roman Vasilets <rvasilets@mirantis.com>
Co-Authored-By: Marco Morais <mmorais@yahoo-inc.com>

Change-Id: Ida19c02f831e1846bb96a239f4a2deb5ae417153

rally-jobs/rally-neutron.yaml

@@ -297,6 +297,22 @@
         failure_rate:
           max: 0
 
+  Quotas.neutron_update:
+    -
+      args:
+        max_quota: 1024
+      runner:
+        type: "constant"
+        times: 10
+        concurrency: 2
+      context:
+        users:
+          tenants: 3
+          users_per_tenant: 2
+      sla:
+        failure_rate:
+          max: 0
+
   NovaServers.boot_server:
     -
       args:

samples/tasks/scenarios/quotas/neutron-update.json

@@ -0,0 +1,20 @@
+{
+    "Quotas.neutron_update": [
+        {
+            "args": {
+                "max_quota": 1024
+            },
+            "runner": {
+                "type": "constant",
+                "times": 10,
+                "concurrency": 2
+            },
+            "context": {
+                "users": {
+                    "tenants": 3,
+                    "users_per_tenant": 2
+                }
+            }
+        }
+    ]
+}

samples/tasks/scenarios/quotas/neutron-update.yaml

@@ -0,0 +1,13 @@
+---
+  Quotas.neutron_update:
+    -
+      args:
+        max_quota: 1024
+      runner:
+        type: "constant"
+        times: 10
+        concurrency: 2
+      context:
+        users:
+          tenants: 3
+          users_per_tenant: 2