playbook: Relax finding of public-ipv4 file

As more then one type of ERP5ish software release can be build
with the playbook, make finding ipv4 more reliable.

Also, as there can be only one public IPv4 drop the playbook_name
namespace from the detected value.

playbook/roles/standalone-shared/files/erp5-show

@@ -120,14 +120,9 @@ def status():
     frn_sr = [q for q in software_release_list
         if 'software/apache-frontend' in q][0]
     zope_ip, pw = get_connection_information(erp5_sr)
-    if 'software/erp5' in erp5_sr:
-      filename = '/tmp/playbook-erp5-public-ipv4'
-    elif 'software/wendelin' in erp5_sr:
-      filename = '/tmp/playbook-wendelin-public-ipv4'
-    else:
-      raise ValueError
+
     try:
-      ip = open(filename).read()
+      ip = open('/tmp/playbook-public-ipv4').read()
     except Exception:
       frontend = None
     else:
@@ -135,7 +130,6 @@ def status():
         frontend = zope_ip
       else:
         frontend = 'https://' + ip
-
     frontend_ip, _ = get_connection_information(frn_sr)
 
     if zope_ip is None or frontend is None or frontend_ip is None:

playbook/roles/standalone-shared/tasks/main.yml

@@ -3,7 +3,7 @@
     include_vars: erp5-common.yml
 
   - name: Store public IPv4 for other scripts
-    shell: echo "{{ ansible_default_ipv4.address }}" > /tmp/playbook-{{ playbook_name }}-public-ipv4
+    shell: echo "{{ ansible_default_ipv4.address }}" > /tmp/playbook-public-ipv4
 
   - name: create instance request script
     template: src={{ request_instance_template }} dest=/tmp/playbook-request-{{ playbook_name }} mode=700