Capture json console and write it to workspace for reproducer

As part of the task at [1] we need to capture some variables
from the ci run (like executed pre-run playbooks). This writes
the json console to a file in the logs/workspace directory so
we can use in the reproducer with [2].

[1] https://tree.taiga.io/project/tripleo-ci-board/task/270
[2] Used by https://review.openstack.org/613572
Co-Authored-By: Gabriele Cerami <gcerami@redhat.com>
Change-Id: I75030a5cd75fbd324356fdff9d0a07e51a3a2c7f

playbooks/tripleo-ci/post.yaml

@@ -1,6 +1,17 @@
+- name: Write console log to localhost as fact zuul_console_json
+  hosts: localhost
+  tasks:
+    - name: capture console log json as fact
+      set_fact:
+        zuul_console_json: "{{ lookup('file', zuul.executor.log_root + '/job-output.json') }}"
+
 - name: Collect logs
   hosts: primary
   tasks:
+    - name: Copy zuul_console_json log to workspace for reproducer
+      copy:
+        content: "{{ hostvars['localhost'].zuul_console_json }}"
+        dest: "{{ ansible_user_dir }}/workspace/logs/zuul_console.json"
 
     - name: Run ansible playbook to collect logs
       shell: |