Collect tobiko.conf file on CI jobs

Change-Id: I9a3e158d7fb3aff86e1430b550a49977d53e5b26

roles/tobiko/tasks/main.yaml

@@ -23,5 +23,6 @@
 
     - when: tobiko_post_run | bool
       block:
+        - include: post/config.yaml
         - include: post/report.yaml
         - include: post/log.yaml

roles/tobiko/tasks/post/config.yaml

@@ -0,0 +1,15 @@
+---
+
+- name: check if {{ tobiko_conf_file }} file exists
+  stat:
+    path: "{{ tobiko_conf_file }}"
+  register: check_tobiko_conf_file
+
+
+- name: "Collect {{ tobiko_conf_file }} file"
+  synchronize:
+    dest: "{{ collect_files_dir }}"
+    mode: pull
+    src: "{{ tobiko_conf_file }}"
+    verify_host: true
+  when: check_tobiko_conf_file.stat.exists