DCD-224: Download locally rather than to the shared drive to avoid races.

roles/jira_download/tasks/main.yml

@@ -17,10 +17,15 @@
 - name: Use version for product version
   command: "cat {{ atl_product_version_cache }}"
   register: atl_product_version_file
+  changed_when: False
 
+# Note: We don't cache this in the shared drive to the complexity
+# around download race-conditions if multiple nodes are starting at
+# the same time. When downloading from product-downloads.atlassian.com
+# (which is a CDN) takes seconds anyway.
 - name: Fetch product installer
   get_url:
     url: "{{ atl_product_download_url }}"
-    dest: "{{ atl_product_download_cache }}"
+    dest: "{{ atl_product_download }}"
     mode: 0755
     force: false