Don't overwrite katello-devel-answers.yaml

This allows re-running the provisioner without overwriting the
user's changes to the configuration, so that the installer in
devel setups more closely matches the familiar standard behavior.

roles/foreman_installer_devel_scenario/files/katello-devel.yaml

@@ -5,8 +5,6 @@
 :log_name: katello-devel.log
 :log_level: DEBUG
 :no_prefix: false
-# Forklift always overwrites the answers so let's not pretend we save them
-:dont_save_answers: true
 :answer_file: /etc/foreman-installer/scenarios.d/katello-devel-answers.yaml
 :installer_dir: /usr/share/foreman-installer
 :module_dirs: /usr/share/foreman-installer/modules

roles/foreman_installer_devel_scenario/tasks/main.yml

@@ -16,10 +16,11 @@
   with_items:
     - katello-devel.yaml
 
-- name: 'Copy answers file'
+- name: "Create devel scenario answers file if it doesn't already exist"
   template:
     src: "{{ role_path }}/templates/{{ item }}"
     dest: /etc/foreman-installer/scenarios.d/{{ item }}
+    force: no
   with_items:
     - katello-devel-answers.yaml