Merge branch 'factorize-postgresql-systemd-tasks' into 'master'

Role postgresql, task systemd: factorize tasks.

See merge request !2

postgresql/tasks/systemd.yml

@@ -26,36 +26,11 @@
     - path_to_icat != None
     - path_to_icat | length > 0
 
-- name: Start postgresql service on CentOS 7
-  systemd:
-    name: postgresql
-    state: started
-    daemon_reload: yes
-    enabled: yes
-  when: (ansible_facts['distribution'] == "CentOS" and ansible_facts['distribution_major_version'] == "7" and use_distribution_postgresql)
-
-- name: Start postgresql-{{ external_postgresql_version }} service on CentOS 7
+- name: "Start {{ postgres_unit_file_name }}"
   systemd: 
-    name: postgresql-{{ external_postgresql_version }}
-    state: started
-    daemon_reload: yes
-    enabled: yes
-  when: (ansible_facts['distribution'] == "CentOS" and ansible_facts['distribution_major_version'] == "7" and not use_distribution_postgresql)
-
-- name: Start postgresql service on CentOS 8
-  systemd:
-    name: postgresql
-    state: started
-    daemon_reload: yes
-    enabled: yes
-  when: (ansible_facts['distribution'] == "CentOS" and ansible_facts['distribution_major_version'] == "8" and use_distribution_postgresql)
-
-- name: Start postgresql-{{ external_postgresql_version }} service on CentOS 8
-  systemd:
-    name: postgresql-{{ external_postgresql_version }}
+    name: "{{ postgres_unit_file_name }}"
     state: started
     daemon_reload: yes
     enabled: yes
-  when: (ansible_facts['distribution'] == "CentOS" and ansible_facts['distribution_major_version'] == "8" and not use_distribution_postgresql)
 
 ...