disable authentication for neo4j, since we're connecting from behind a vpn

CHANGELOG.md

 - Role: neo4j
   - Updated neo4j to 3.2.2
+  - Removed authentication requirement for neo4j
 
 - Role: forum
   - Added `FORUM_REBUILD_INDEX` to rebuild the ElasticSearch index from the database, when enabled.  Default: `False`.

playbooks/roles/neo4j/tasks/main.yml

@@ -53,6 +53,15 @@
     - install
     - install:base
 
+- name: turn off authentication (we're accessing neo4j from behind a private vpn)
+  lineinfile:
+    dest: "{{ neo4j_server_config_file }}"
+    regexp: "dbms.security.auth_enabled="
+    line: "dbms.security.auth_enabled=false"
+  tags:
+    - install
+    - install:configuration
+
 - name: set neo4j heap size
   lineinfile:
     dest: "{{ neo4j_server_config_file }}"