CLDSRV-740: tests package.json private true

Remove warning

```
warning package.json: No license field
```

Author: BourgoisMickael

tests/functional/healthchecks/package.json

@@ -3,6 +3,7 @@
   "version": "0.1.0",
   "description": "Test-healthcheck",
   "main": "tests.js",
+  "private": true,
   "repository": "",
   "keywords": [
     "test"

tests/functional/raw-node/package.json

@@ -3,6 +3,7 @@
   "version": "0.1.0",
   "description": "Test-rawnode",
   "main": "tests.js",
+  "private": true,
   "repository": "",
   "keywords": [
     "test"

tests/functional/report/package.json

@@ -1,5 +1,6 @@
 {
     "name": "report-tests",
+    "private": true,
     "scripts": {
         "test": "mocha -t 40000 *.js"
     }