Give the option to not force the Zulu repository

defaults/main.yml

@@ -7,6 +7,7 @@ openjdk_version:
   - '{{ openjdk_default }}'
 
 dismissed_openjdk_ppa: 'ppa:openjdk-r/ppa'
+openjdk_force_system_jdk_on_trusty: False
 openjdk_zulu_repo_install: False
 openjdk_zulu_repo_key_id: '0xB1998361219BD9C9'
 openjdk_zulu_repository: 'deb http://repos.azulsystems.com/{{ ansible_distribution | lower }} stable main'

tasks/openjdk_deb.yml

@@ -9,7 +9,9 @@
   - name: Check if we must use the Zulu repository
     set_fact:
       openjdk_zulu_repo_install: True
-    when: ansible_distribution_major_version <= '16'
+    when:
+      - ansible_distribution_major_version <= '16'
+      - not openjdk_force_system_jdk_on_trusty
 
   tags: [ 'jdk', 'openjdk' ]