Add mising 'prometheus' yaml level

Rename prometheus ssl key

Change-Id: I5fb4093e1679a6e541061749ced800c29847a13b
diff --git a/prometheus/server/target/etcd.yml b/prometheus/server/target/etcd.yml
index 41204b5..ae75c64 100644
--- a/prometheus/server/target/etcd.yml
+++ b/prometheus/server/target/etcd.yml
@@ -1,10 +1,16 @@
 parameters:
-  server:
-    target:
-      etcd:
-        - host: ${_param:cluster_node01_address}
-          port: ${_param:cluster_node01_port}
-        - host: ${_param:cluster_node02_address}
-          port: ${_param:cluster_node02_port}
-        - host: ${_param:cluster_node03_address}
-          port: ${_param:cluster_node03_port}
+  prometheus:
+    server:
+      target:
+        etcd:
+          scheme: https
+          ssl_dir: /opt/prometheus/config
+          cert_name: prometheus-server.crt
+          key_name: prometheus-server.key
+          member:
+          - host: ${_param:cluster_node01_address}
+            port: ${_param:cluster_node01_port}
+          - host: ${_param:cluster_node02_address}
+            port: ${_param:cluster_node02_port}
+          - host: ${_param:cluster_node03_address}
+            port: ${_param:cluster_node03_port}