erp5: include generic hostnames in $HOSTS

Otherwise, hostnames such as localhost or this machine hostname will be
resolved by DNS server.
Some DNS servers ( for example 208.67.222.222 or 8.8.8.8, but 1.1.1.1
does ) do not resolve localhost.

stack/erp5/buildout.hash.cfg

@@ -71,7 +71,7 @@ md5sum = 0969fbb25b05c02ef3c2d437b2f4e1a0
 
 [template]
 filename = instance.cfg.in
-md5sum = eba0b4596484dcf24b1da29ddeac453d
+md5sum = e34d544f41057eafaa459d65bfa04aa6
 
 [monitor-template-dummy]
 filename = dummy.cfg
@@ -87,7 +87,7 @@ md5sum = d1f33d406d528ae27d973e2dd0efb1ba
 
 [template-zope]
 filename = instance-zope.cfg.in
-md5sum = 3fdfbc82c450c35a9a444dfbc0a1c196
+md5sum = 115e48926bdb73ca042f6b5c38bdadfa
 
 [template-balancer]
 filename = instance-balancer.cfg.in

stack/erp5/instance-zope.cfg.in

@@ -171,6 +171,8 @@ context = key host_dict hosts-parameter:hostalias-dict
 [hosts]
 < = jinja2-template-base
 template = inline: {{ '
+  127.0.0.1 localhost
+  127.0.1.1 {% socket.getfqdn() %} {% socket.gethostname() %}
   {% for alias, aliased in host_dict.items() -%}
   {{ aliased }} {{ alias }}
   {% endfor %}

stack/erp5/instance.cfg.in

@@ -150,6 +150,7 @@ extra-context =
     import urlparse urlparse
     import hashlib hashlib
     import itertools itertools
+    import socket socket
 
 [dynamic-template-kumofs-parameters]
 dash-location = {{ dash_location }}