Fix ipv6 hosts entries

Change-Id: I83f09d01ff047bd61e044977b1eae0e2d0442b5c

linux/files/hosts

         network.hostname|default(grains.nodename)
     ],
     '::1': [
-        'localhost',
         'ip6-localhost',
         'ip6-loopback'
     ],
+    'fe00::0': [
+        'ip6-localnet',
+        'ip6-mcastprefix'
+    ],
     'ff02::1': [
         'ip6-allnodes'
     ],
     'ff02::2': [
         'ip6-allrouters'
     ],
+    'ff02::3': [
+        'ip6-allhosts'
+    ],
 } -%}
 {%- for name, host in network.host.iteritems() -%}
 {%- do hosts.update({host.address: host.names}) -%}