Enforce creation of unarchived custom firefox file.

playbooks/roles/jenkins_worker/tasks/python_platform_worker.yml

@@ -84,7 +84,13 @@
 # platform pull requests to use a custom firefox path to a different
 # version
 - name: Install custom firefox to jenkins home
-  get_url: url={{ custom_firefox_url }} dest={{ jenkins_home }}/firefox-{{ custom_firefox_version }}.tar.bz2
+  get_url:
+    url: "{{ custom_firefox_url }}"
+    dest: "{{ jenkins_home }}/firefox-{{ custom_firefox_version }}.tar.bz2"
 
 - name: unpack custom firefox version
-  unarchive: src={{ jenkins_home }}/firefox-{{ custom_firefox_version }}.tar.bz2 dest={{ jenkins_home }} copy=no
+  unarchive:
+    src: "{{ jenkins_home }}/firefox-{{ custom_firefox_version }}.tar.bz2"
+    dest: "{{ jenkins_home }}"
+    creates: "{{ jenkins_home }}/firefox"
+    copy: no