oraswdb-install: make init/systemd much more robust

It should work against unsupport OS as well.

Author: Rendanic

roles/oraswdb-install/defaults/main.yml

@@ -41,7 +41,7 @@
   autostartup_service: false # automatic startup/stop databases service
   hostinitdaemon: "{% if    ansible_os_family == 'RedHat' and ansible_distribution_major_version | int >= 7   %}systemd
                    {%- elif ansible_os_family == 'Suse'   and ansible_distribution_major_version | int >= 12 %}systemd
-                   {%- else %}init{% endif %}"
+                   {%- else %}{% if ansible_service_mgr is defined %}{{ ansible_service_mgr }}{% else %}init{% endif %}{% endif %}"
 
   oracle_directories:
           - {name: "{{ oracle_stage }}", owner: "{{ oracle_user }}", group: "{{ oracle_group }}", mode: 775 }