Move CNI config file to the end of launch script

So something waiting for the config (e.g. Kubernetes) doesn't try to
talk to Weave before then (this only helps on first install, but that
tends to be when things are busiest).

prog/weave-kube/launch.sh

@@ -18,17 +18,6 @@ fi
 
 echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables
 
-# Create CNI config, if not already there
-if [ ! -f /etc/cni/net.d/10-weave.conf ] ; then
-    mkdir -p /etc/cni/net.d
-    cat > /etc/cni/net.d/10-weave.conf <<EOF
-{
-    "name": "weave",
-    "type": "weave-net"
-}
-EOF
-fi
-
 SOURCE_BINARY=/usr/bin/weaveutil
 VERSION=$(/home/weave/weaver $EXTRA_ARGS --version | sed -E 's/weave router (.*?)/\1/')
 PLUGIN="weave-plugin-$VERSION"
@@ -152,4 +141,15 @@ done
     reclaim_ips "_" $IPS
 done
 
+# Create CNI config, if not already there
+if [ ! -f /etc/cni/net.d/10-weave.conf ] ; then
+    mkdir -p /etc/cni/net.d
+    cat > /etc/cni/net.d/10-weave.conf <<EOF
+{
+    "name": "weave",
+    "type": "weave-net"
+}
+EOF
+fi
+
 wait $WEAVE_PID