Add quota option to tobiko IR plugin

The quota option can be used to set quota values for the different
openstack resources

E.g.: --quota routers=50 --quota secgroups=-1

Change-Id: Iacbe083fe768715dba717a8e0661f7c3ddfe054a

infrared_plugin/plugin.spec

@@ -225,6 +225,17 @@ subparsers:
             type: Flag
             help: Ignore flaky test cases
             ansible_variable: test_flaky
+          quota:
+            type: NestedDict
+            action: append
+            ansible_variable: quota
+            help: |
+                Configure quota values for different resources
+                These quotas will be applied to the admin openstack project
+                Example:
+                    --quota routers=30
+                    --quota secgroups=50
+                Check "openstack quota set --help" for more information
 
       - title: Cleanup stage
         options:

infrared_plugin/roles/tobiko-ir-before-run/defaults/main.yaml

@@ -0,0 +1,4 @@
+---
+
+# OpenStack client credentials
+stackrc_file: '{{ ansible_user_dir }}/overcloudrc'

infrared_plugin/roles/tobiko-ir-before-run/tasks/main.yaml

@@ -0,0 +1,7 @@
+---
+
+- name: apply quotas to the openstack admin project
+  shell: |
+    source {{ stackrc_file }}
+    openstack quota set --{{ item.key }} {{ item.value }} $OS_PROJECT_NAME
+  with_dict: "{{ quota | default({}) }}"

infrared_plugin/roles/tobiko-ir-run/tasks/main.yaml

@@ -63,6 +63,9 @@
         name: validations-common
         state: present
 
+    - name: apply pre-requisites before tests run
+      include_role: name=tobiko-ir-before-run
+
     - name: "initialize test execution"
       include_role: name=tobiko-configure