Merge pull request #3431 from edx/bbeggs/migrations_fix

Add trailing slash to run_migrations so files go in to a directory

playbooks/continuous_delivery/run_migrations.yml

@@ -79,7 +79,7 @@
   - name: Transfer artifacts to the proper place.
     fetch:
       src: "{{ temp_output_dir.stdout }}/{{ item }}"
-      dest: "{{ ARTIFACT_PATH }}"
+      dest: "{{ ARTIFACT_PATH }}/"
       flat: True
       fail_on_missing: True
       mode: 0700