Added include_vars usage to include ubuntu/xenial specific vars.

Author: Mauro Oviedo

tasks/extensions/postgis.yml

@@ -1,14 +1,16 @@
 # file: postgresql/tasks/extensions/postgis.yml
 
+- include_vars: "{{ item }}"
+  with_first_found:
+    - "../vars/{{ ansible_distribution_release }}.yml"
+    - "../vars/empty.yml"
+
 - name: PostgreSQL | Extensions | Make sure the postgis extensions are installed
   apt:
     name: "{{item}}"
     state: present
     update_cache: yes
     cache_valid_time: "{{apt_cache_valid_time | default (3600)}}"
-  with_items:
-    - libgeos-c1
-    - "postgresql-{{postgresql_version}}-postgis-{{postgresql_ext_postgis_version}}"
-    - "postgresql-{{postgresql_version}}-postgis-scripts"
+  with_items: "{{ postgresql_ext_postgis_deps }}"
   notify:
     - restart postgresql