Publish validations-extra-args parameter in infrared plugin.

Allowing to pass a specific string with extra arguments when invoking
the validations for a group.
The patch adds a new parameter at role and infrared's plugin level called
--validations-extra-args (infrared) and validations_extra_args (role). This
string will be appended to the 'openstack tripleo validator run' call and it
allows to pass some other arguments, as --extra-vars, or --extra-vars-file.
By defaults it is set to empty string.

Change-Id: Ie2acc014f51dc679e4e77ff87f62cfeff7422296

defaults/main.yml

@@ -52,6 +52,11 @@ run_validations: false
 # comma separated list of skipped validations
 skiplist_validations: ''
 
+# extra arguments to pass in the validations group
+# execution.
+# Example: validations_extra_args: "--extra-vars min_undercloud_ram_gb=5"
+validations_extra_args: ''
+
 # validations groups for updates to be
 # executed if updates_validations is true.
 updates_validations_groups:

infrared_plugin/main.yml

@@ -236,6 +236,10 @@
           set_fact:
             skiplist_validations: "{{ install.skiplist.validations }}"
 
+        - name: Extra arguments to be passed in the validations run
+          set_fact:
+            validations_extra_args: "{{ install.validations.extra.args }}"
+
       tags:
         - always
   roles:

infrared_plugin/plugin.spec

@@ -194,6 +194,13 @@ subparsers:
                       help: |
                           Comma separated string of validations names to be skipped.
                       default: ''
+                  validations-extra-args:
+                      type: Value
+                      help: |
+                          String containing some extra arguments to be passed in
+                          the validations group execution.
+                          Example: validations-extra-args: "--extra-vars min_undercloud_ram_gb=5"
+                      default: ''
 
             - title: TripleO Options
               options:

tasks/common/validation_group_run.yaml

@@ -15,7 +15,7 @@
         set -o pipefail
         source {{ undercloud_rc }}
         openstack tripleo validator run --validation {{ validations_filtered | join(',') }} --stack {{ overcloud_stack_name }} \
-           {{ validation_args|default('') }} 2>&1 {{ timestamper_cmd }} >> validation-{{ validation_group }}.log
+           {{ validations_extra_args }} 2>&1 {{ timestamper_cmd }} >> validation-{{ validation_group }}.log
       args:
         executable: /usr/bin/bash
   rescue:

tasks/fast-forward-upgrade/main.yml

@@ -157,7 +157,6 @@
       vars:
         validation_group: "pre-upgrade"
         validation_allowed_groups: "{{ upgrades_validations_groups }}"
-        validation_args: "--python-interpreter /usr/libexec/platform-python"
       when: run_validations|bool
       tags:
         - overcloud_upgrade_prepare