move admin pwd param from vars to defaults, add assert

roles/keycloak/tasks/prereqs.yml

@@ -1,4 +1,12 @@
 ---
+- name: Validate admin console password
+  ansible.builtin.assert:
+    that:
+      - keycloak_admin_password | length > 12
+    quiet: True
+    fail_msg: "The console administrator password is empty or invalid. Please set the keycloak_admin_password variable to a 16+ char long string"
+    success_msg: "{{ 'Console administrator password OK' }}"
+
 - name: Validate configuration
   ansible.builtin.assert:
     that:
@@ -16,7 +24,7 @@
     fail_msg: "Cannot install Red Hat SSO without RHN credentials. Check rhn_username and rhn_password are defined"
     success_msg: "{{ 'Installing Red Hat Single Sign-On' if keycloak_rhsso_enable else 'Installing keycloak.org' }}"
 
-- name: Ensures required packages are installed
+- name: Ensure required packages are installed
   ansible.builtin.include_tasks: fastpackages.yml
   vars:
     packages_list: