some schema changes

software/jstestnode/instance-jstestnode-input-schema.json

 {
   "$schema": "http://json-schema.org/draft-07/schema#",
   "description": "Parameters to instantiate JSTestNode",
-  "additionalProperties": true,
+  "additionalProperties": false,
+  "required": ["test-suite", "test-runner"],
   "properties": {
     "test-suite": {
       "description": "The test suite to run",
@@ -22,6 +23,7 @@
       "oneOf": [
         {
           "type": "object",
+          "title": "Selenium",
           "description": "Configuration for Selenium server",
           "additionalProperties": false,
           "required": [
@@ -71,6 +73,7 @@
         },
         {
           "type": "object",
+          "title": "Firefox",
           "description": "Configuration for Firefox",
           "additionalProperties": false,
           "properties": {
@@ -84,6 +87,7 @@
         },
         {
           "type": "object",
+          "title": "Nodejs",
           "description": "Configuration for NodeJS",
           "additionalProperties": false,
           "properties": {