nuageinit: fix authorized_key test

After miss reading the cloudinit spec I ended up writting a wrong
test for basic ssh key setup, nuageinit has been fixed, but not
the test, here is the actual fix.

Reported by:	markj

libexec/nuageinit/tests/nuageinit.sh

@@ -173,16 +173,17 @@ EOF
 config2_pubkeys_body()
 {
 	here=$(pwd)
+	export NUAGE_FAKE_ROOTDIR=$(pwd)
 	if [ $(id -u) -ne 0 ]; then
 		atf_skip "root required"
 	fi
 	mkdir -p media/nuageinit
-	cat > media/nuageinit/meta_data.json << EOF
-{
-   "public_keys": {
-       "mykey": "ssh-rsa AAAAB3NzaC1y...== Generated by Nova"
-   },
-}
+	touch media/nuageinit/meta_data.json
+	cat > media/nuageinit/user-data << EOF
+#cloud-config
+
+ssh_authorized_keys:
+  - "ssh-rsa AAAAB3NzaC1y...== Generated by Nova"
 EOF
 	mkdir -p etc
 	cat > etc/master.passwd <<EOF
@@ -194,7 +195,6 @@ EOF
 wheel:*:0:root
 users:*:1:
 EOF
-	export NUAGE_FAKE_ROOTDIR=$(pwd)
 	atf_check /usr/libexec/nuageinit ${here}/media/nuageinit config-2
 	atf_check -o inline:"ssh-rsa AAAAB3NzaC1y...== Generated by Nova\n" cat home/freebsd/.ssh/authorized_keys
 }