Have the project update playbook warn if role/collection syncing is disabled.

Make it more clear that a credential is required.

awx/playbooks/project_update.yml

@@ -156,6 +156,21 @@
   name: Install content with ansible-galaxy command if necessary
   tasks:
 
+    - name: Check content sync settings
+      debug:
+        msg: "Collection and role syncing disabled. Check the AWX_ROLES_ENABLED and AWX_COLLECTIONS_ENABLED settings and Galaxy credentials on the project's organization."
+      when: not roles_enabled|bool and not collections_enabled|bool
+      tags:
+        - install_roles
+        - install_collections
+
+    - name:
+      meta: end_play
+      when: not roles_enabled|bool and not collections_enabled|bool
+      tags:
+        - install_roles
+        - install_collections
+
     - block:
         - name: fetch galaxy roles from requirements.(yml/yaml)
           command: >