delegate mysql user creation for phabricator to correct host

roles/phabricator/tasks/main.yml

@@ -27,6 +27,7 @@
     state: present
     login_user: root
     login_password: "{{ mariadb_root_password }}"
+    delegate_to: "{{ inventory_hostname }}"
 
 - name: create phabricator daemon user
   user: name={{ phabricator_daemon_user }}