apache-frontend: Fix monitor configuration

  The password and username has to be passed to the others instances and used

software/apache-frontend/instance-apache-frontend.cfg

@@ -560,12 +560,21 @@ apache-certificate =
 open-port = 80 443
 extra_slave_instance_list =
 frontend-name =
-
+monitor-cors-domains =
+monitor-httpd-port = 8072
+monitor-username = $${monitor-htpasswd:username}
+monitor-password = $${monitor-htpasswd:passwd}
 
 #######
 # Monitoring sections
 #
 
+[monitor-instance-parameter]
+monitor-httpd-port = $${slap-parameter:monitor-httpd-port}
+cors-domains = $${slap-parameter:monitor-cors-domains}
+username = $${slap-parameter:monitor-username}
+password = $${slap-parameter:monitor-password}
+
 [monitor-conf-parameters]
 private-path-list += 
   $${directory:logrotate-backup}