software/cdn-me: add missing output schema

monitor_v6_url and info_1 were not documented, monitor_v6_url is useless
since we have monitor_url and info_1 seems "self explanatory" for humans
and not targeted at machines.

also fix typo on publish-connection-informations

software/cdn-me/instance-cdn-me-output-schema.json

+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "description": "Values returned by CDN ME instanciation",
+  "properties": {
+    "url-https": {
+      "description": "URL to access instance",
+      "type": "string"
+    },
+    "url-http": {
+      "description": "URL to access instance over unencrypted HTTP",
+      "type": "string"
+    },
+    "token": {
+      "description": "Token for Re6st",
+      "type": "string"
+    },
+    "ipv6": {
+      "description": "IPv6 address of the instance",
+      "type": "string"
+    },
+    "ipv4": {
+      "description": "IPv4 address of the instance",
+      "type": "string"
+    },
+    "monitor_url": {
+      "description": "URL to access monitoring interface",
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

software/cdn-me/instance-cdn-request.cfg.jinja2

 [buildout]
 parts =
   request-monitor-test-distributor-slave 
-  publish-connection-informations
+  publish-connection-information
   connection-parameter-http-checker
   connection-parameter-checker
 
@@ -135,7 +135,7 @@ slave = true
 config-url = $${request-monitor-test-distributor-slave:connection-site_url}
 return = site_url domain
 
-[publish-connection-informations]
+[publish-connection-information]
 recipe = slapos.cookbook:publish
 url-https =  https://$${request-frontend-token-slave:connection-domain}
 url = http://$${request-frontend-token-slave:connection-domain}
@@ -156,6 +156,6 @@ expected-value =
 [connection-parameter-http-checker]
 recipe = slapos.cookbook:check_parameter
 path = $${directory:promise}/check_re6stnet_http
-value = $${publish-connection-informations:url}
+value = $${publish-connection-information:url}
 expected-not-value = http://
 expected-value =