Restart each interface in ubuntu context

Ubuntu does not support restarting network and it needs to
restart each of the interfaces. In debian restarting the network
works and will continue to use the same method.

lsb_release command is not used as it is not installed by default
in debian.

share/scripts/context-packages/base_deb/etc/one-context.d/00-network

@@ -170,7 +170,8 @@ configure_network()
 
 activate_network()
 {
-    if [[ `lsb_release -c | awk '{print($2)}'` = precise ]]; then
+    . /etc/os-release
+    if [ ID = "ubuntu" ]; then
         IFACES=`get_interfaces`
 
         for i in $IFACES; do