playbook: Move variables to the playbook instead use roles vars

The roles vars have priority  the playbook ones (at least on 2.x):

http://docs.ansible.com/ansible/latest/user_guide/playbooks_variables.html#id18

playbook/erp5-standalone.yml

@@ -7,5 +7,7 @@
     bt5_list: erp5_full_text_myisam_catalog erp5_configurator_standard
     startup_playbook_id: erp5-standalone.yml
     playbook_name: erp5
+    request_instance_template: request-erp5.j2
+    request_frontend_template: request-erp5-frontend.j2
   roles:
     - standalone-shared

playbook/roles/standalone-shared/vars/main.yml

 frontend_software_release_url: https://lab.node.vifib.com/nexedi/slapos/raw/1.0.56.1/software/apache-frontend/software.cfg
-request_instance_template: request-erp5.j2
-request_frontend_template: request-erp5-frontend.j2
 firewall_setup_template: setup-firewall.j2
 frontend_master_reference: master-frn-{{ playbook_name }}
 frontend_slave_reference: slave-srn-{{ playbook_name }}

playbook/webrunner-standalone.yml

@@ -3,10 +3,10 @@
   connection: local
 
   vars:
-    software_release_url: https://lab.node.vifib.com/nexedi/slapos/raw/1.0.11/software/slaprunner/software.cfg
+    software_release_url: https://lab.node.vifib.com/nexedi/slapos/raw/1.0.60/software/slaprunner/software.cfg
     startup_playbook_id: webrunner-standalone.yml
     playbook_name: webrunner
     request_instance_template: request-webrunner.j2
-
+    request_frontend_template: request-erp5-frontend.j2
   roles:
     - standalone-shared

playbook/wendelin-standalone.yml

@@ -6,6 +6,8 @@
     software_release_url: https://lab.node.vifib.com/nexedi/slapos/raw/1.0.56/software/wendelin/software.cfg
     bt5_list: erp5_full_text_myisam_catalog erp5_configurator_standard erp5_wendelin_configurator
     startup_playbook_id: wendelin-standalone.yml
+    request_instance_template: request-erp5.j2
+    request_frontend_template: request-erp5-frontend.j2
     playbook_name: wendelin
   roles:
     - standalone-shared

[Łukasz Nowak]

I saw now, that I shall used another directory with default variables, see http://docs.ansible.com/ansible/latest/user_guide/playbooks_variables.html#variable-precedence-where-should-i-put-a-variable

role defaults [1]

It is better explained in http://docs.ansible.com/ansible/latest/user_guide/playbooks_best_practices.html#directory-layout:

    defaults/         #
        main.yml      #  <-- default lower priority variables for this role

It shall be in defaults/ not in vars/, so this would become "default if not defined".

I will experiment more about this in the future.