[nancy][grue] Add IPv6 for grue custer

data/grid5000/sites/nancy/clusters/grue/nodes/grue-1.json

@@ -94,6 +94,7 @@
       "firmware_version": "7.10 0x8000519f 19.0.12",
       "interface": "Ethernet",
       "ip": "172.16.77.1",
+      "ip6": "2001:660:4406:500:2::1",
       "kavlan": true,
       "mac": "e4:43:4b:a5:71:dc",
       "management": false,

data/grid5000/sites/nancy/clusters/grue/nodes/grue-2.json

@@ -94,6 +94,7 @@
       "firmware_version": "7.10 0x8000519f 19.0.12",
       "interface": "Ethernet",
       "ip": "172.16.77.2",
+      "ip6": "2001:660:4406:500:2::2",
       "kavlan": true,
       "mac": "e4:43:4b:a5:b1:10",
       "management": false,

data/grid5000/sites/nancy/clusters/grue/nodes/grue-3.json

@@ -94,6 +94,7 @@
       "firmware_version": "7.10 0x8000519f 19.0.12",
       "interface": "Ethernet",
       "ip": "172.16.77.3",
+      "ip6": "2001:660:4406:500:2::3",
       "kavlan": true,
       "mac": "e4:43:4b:a4:49:fa",
       "management": false,

data/grid5000/sites/nancy/clusters/grue/nodes/grue-4.json

@@ -94,6 +94,7 @@
       "firmware_version": "7.10 0x8000519f 19.0.12",
       "interface": "Ethernet",
       "ip": "172.16.77.4",
+      "ip6": "2001:660:4406:500:2::4",
       "kavlan": true,
       "mac": "e4:43:4b:a5:4f:b8",
       "management": false,

data/grid5000/sites/nancy/clusters/grue/nodes/grue-5.json

@@ -94,6 +94,7 @@
       "firmware_version": "7.10 0x8000519f 19.0.12",
       "interface": "Ethernet",
       "ip": "172.16.77.5",
+      "ip6": "2001:660:4406:500:2::5",
       "kavlan": true,
       "mac": "e4:43:4b:a4:02:ec",
       "management": false,

input/grid5000/sites/nancy/clusters/grue/grue_ipv6.yaml.erb

+nodes:
+<% (1..5).each do |index| %>
+  grue-<%= index %>:
+    network_adapters:
+      eth0:
+        ip6: 2001:660:4406:500:2::<%= index.to_s(16) %>
+<% end %>
+