Add testing for custom callback feature

This patch adds a custom callback to the execution of the check-cpu and
check-ram validations.

Change-Id: Ic9391998dcad74dd82cab4c29de46343663225c6
Signed-off-by: Gael Chamoulaud (Strider) <gchamoul@redhat.com>

roles/validations/tasks/run.yaml

@@ -2,8 +2,13 @@
 - name: Run validations
   register: run_validation
   shell:
-    cmd: "{{ validation_command }} run --validation {{ name.key }} {{ validation_dir }} {{ ansible_dir }} \
-    --inventory {{ inventory }} --output-log validation_{{ name.key }}.log {{ name.value.extra_args }}"
+    cmd: >-
+      {{ validation_command }} run --validation {{ name.key }}
+      {{ validation_dir }} {{ ansible_dir }}
+      --inventory {{ inventory }}
+      --output-log validation_{{ name.key }}.log
+      {{ name.value.extra_args }}
+      {{ name.value.extra_env_args }}
     executable: /bin/bash
 
 - name: Get Run results

roles/validations/vars/main.yaml

@@ -3,19 +3,25 @@ validations_list:
   compute:
     - nova-status:
         extra_args: ""
+        extra_env_args: ""
   network:
     - undercloud-neutron-sanity-check:
         extra_args: ""
+        extra_env_args: ""
   validation:
     - check-cpu:
         extra_args: "--extra-vars minimal_cpu_count=2"
+        extra_env_args: "--extra-env-vars ANSIBLE_STDOUT_CALLBACK=default"
     - 512e:
         extra_args: ""
+        extra_env_args: ""
     - check-ram:
         extra_args: "--extra-vars minimal_ram_gb=2"
+        extra_env_args: "--extra-env-vars ANSIBLE_STDOUT_CALLBACK=default"
   tripleo:
     - undercloud-process-count:
         extra_args: ""
+        extra_env_args: ""
 validations_group:
   compute:
     - compute