SAML user attribute flags issue #5303 (PR #11430)

* Adding SAML option in SAML configuration to specify system auditor and system superusers by role or attribute
* Adding keycloak container and documentation on how to start keycloak alongside AWX (including configuration of both)

tools/docker-compose/ansible/roles/sources/templates/docker-compose.yml.j2

@@ -79,6 +79,23 @@ services:
   {% set container_postfix = loop.index %}
     - "awx_{{ container_postfix }}"
   {% endfor %}
+{% endif %}
+{% if enable_keycloak|bool %}
+  keycloak:
+    image: quay.io/keycloak/keycloak:15.0.2
+    container_name: tools_keycloak_1
+    hostname: keycloak
+    user: "{{ ansible_user_uid }}"
+    ports:
+      - "8443:8443"
+    environment:
+      DB_VENDOR: postgres
+      DB_ADDR: postgres
+      DB_DATABASE: keycloak
+      DB_USER: {{ pg_username }}
+      DB_PASSWORD: {{ pg_password }}
+    depends_on:
+      - postgres
 {% endif %}
   # A useful container that simply passes through log messages to the console
   # helpful for testing awx/tower logging