replace regexp by split

roles/server/defaults/main.yml

@@ -10,7 +10,7 @@ server_default_email_sender: "noreply@{{ server_hostname }}"
 server_email_sender: "{{ envsetup_email_sender | default(server_default_email_sender, true) }}"
 
 server_id: "{{ envsetup_ms_id }}"
-server_instance_name: "{{ server_id | regex_replace('^f\\d+_(.*)$', '\\1') }}"
+server_instance_name: "{{ server_id.split('_')[-1] }}"
 server_hostname: "{{ envsetup_ms_server_name }}"
 server_campusmanager: "{{ envsetup_cm_server_name | d('mirismanager.' + server_hostname) }}"
 server_api_key: "{{ envsetup_ms_api_key }}"