playbook: fix non existing ansible_lsb.codename

The command lsb_release must be present on the system to have a working
anisble_lsb dictionary

playbook/roles/repository/tasks/debian_init.yml

@@ -12,3 +12,7 @@
     apt: name=gpg-agent state=present
     when: ansible_distribution == "Debian" and ansible_distribution_major_version|int >= 11
 
+  - name: Install lsb-release using apt
+    apt: name=lsb-release state=present
+    when: ansible_distribution == "Debian" or ansible_distribution == "Ubuntu"
+

playbook/roles/repository/tasks/fedora_init.yml

@@ -2,3 +2,5 @@
   - yum: name=libselinux-python state=present update_cache=yes
     when: ansible_distribution == "Fedora" and ansible_distribution_major_version == "26"
  
+  - yum: name=redhat-lsb-core state=present update_cache=yes
+    when: ansible_distribution == "Fedora"