install backports with "tasks_from"

When including a specific tasks file, we bypass the "main" tasks of the role and the conditionals.
That way we don't play useless tasks and don't rely on default values.

evoacme/tasks/certbot.yml

@@ -4,8 +4,7 @@
   - name: install jessie-backports
     include_role:
       name: apt-repositories
-    vars:
-      apt_repositories_install_backports: True
+      tasks_from: backports.yml
 
   - name: Add exceptions for certbot dependances
     copy:

evomaintenance/tasks/main.yml

@@ -2,8 +2,7 @@
 - name: Install Evolix public repositry
   include_role:
     name: apt-repositories
-  vars:
-    apt_repositories_install_evolix_public: True
+    tasks_from: evolix_public.yml
 
 - name: evomaintenance is installed
   apt:

java8/tasks/main.yml

@@ -6,8 +6,7 @@
 - name: install jessie-backports
   include_role:
     name: apt-repositories
-  vars:
-    apt_repositories_install_backports: True
+    tasks_from: backports.yml
   when: ansible_distribution_release == "jessie"
 
 - name: Java 8 is installed

vrrpd/tasks/main.yml

@@ -2,8 +2,7 @@
 - name: Install Evolix public repositry
   include_role:
     name: apt-repositories
-  vars:
-    apt_repositories_install_evolix_public: True
+    tasks_from: evolix_public.yml
 
 - name: Install vrrpd packages
   apt: