Add new flag cleanup-heat-stacks to the infrared plugin

When this flag is set, the heat stacks created by tobiko are deleted at
the end of the tobiko infrared execution
Additionally, the images created by tobiko are also removed from glance

Change-Id: I3415a7fd73f02e47cf4a0c3351d90db3f7614fef

infrared_plugin/plugin.spec

@@ -193,6 +193,13 @@ subparsers:
             help: Ignore test execution errors
             ansible_variable: ignore_test_failures
 
+      - title: Cleanup stage
+        options:
+          cleanup-heat-stacks:
+            type: Flag
+            help: Cleanup heat stacks created by tobiko
+            ansible_variable: stacks_cleanup
+
       - title: Collect stage
         options:
           collect-dir:

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

@@ -5,3 +5,4 @@ tobiko_git_refspec: ''
 test_git_refspec: ''
 tobiko_git_remote: ''
 test_git_remote: ''
+stacks_cleanup: false

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

@@ -43,6 +43,10 @@
       include_role: name=tobiko-run
 
   rescue:
+    - name: "clean up heat stacks generated during tobiko tests"
+      include_role: name=tobiko-cleanup
+      when: stacks_cleanup
+
     - name: "finalize test execution"
       include_role: name=tobiko-collect
       ignore_errors: yes
@@ -51,6 +55,10 @@
         msg: 'TEST EXECUTION FAILED'
 
 
+- name: "clean up heat stacks generated during tobiko tests"
+  include_role: name=tobiko-cleanup
+  when: stacks_cleanup
+
 - name: "finalize test execution"
   include_role: name=tobiko-collect
 

roles/tobiko-cleanup/defaults/main.yaml

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

roles/tobiko-cleanup/tasks/main.yaml

@@ -0,0 +1,8 @@
+---
+
+- name: "cleanup stacks created by tobiko tests"
+  shell: |
+    source {{ stackrc_file }}
+    openstack stack list -f value -c 'Stack Name' | grep "^tobiko\." | xargs openstack stack delete --wait
+    openstack image list -f value -c Name | grep "^tobiko\." | xargs openstack image delete
+  ignore_errors: yes