Ensure docs directory exists before generating docs

- Also ignore errors will prevent issues with Sphinx from failing
  jobs without a good reason.

Change-Id: I50380f0ff1504cc864599b8ff938c5214ea74af6

roles/collect-logs/tasks/create-docs.yml

@@ -31,7 +31,13 @@
     dest: "{{ artcl_docs_source_dir }}/index.rst"
     force: yes
 
+- name: Ensure docs dir exists
+  file:
+    path: "{{ artcl_collect_dir }}/docs"
+    state: directory
+
 - name: Build docs with Sphinx
   shell: >
     sphinx-build -b html "{{ artcl_docs_source_dir }}"
     "{{ artcl_docs_build_dir }}" &> "{{ artcl_collect_dir }}/docs/sphinx_build.log"
+  ignore_errors: yes