fixing references so each object is validated separately

metadata_tools/resources/elu-institution.json

@@ -2,10 +2,10 @@
   "description": "ELIXIR Luxembourg Partner Schema",
   "title": "A JSON Schema for describing partners institutes.",
   "$schema": "http://json-schema.org/draft-04/schema#",
-  "type": "array",
-  "items": {
+  "type": "object",
+  "allOf": [{
     "$ref": "#/definitions/elu:partner"
-  },
+  }],
   "definitions": {
     "elu:partner": {
       "type": "object",

metadata_tools/resources/elu-project.json

@@ -2,10 +2,10 @@
   "description": "ELIXIR Luxembourg Projects Schema",
   "title": "A JSON Schema for describing biomedical research Projects.",
   "$schema": "http://json-schema.org/draft-04/schema#",
-  "type": "array",
-  "items": {
+  "type": "object",
+  "allOf": [{
     "$ref": "#/definitions/elu:project"
-  },
+  }],
   "definitions": {
     "elu:project": {
       "type": "object",