(GH-154) Use hosted JSON schema files

The JSON schema files for metadata.json and tasks are now available as files
on the forge.  This commit changes the JSON validators to use those instead of
locally vendored files.

Author: glennsarti

client/package.json

@@ -68,8 +68,12 @@
     ],
     "jsonValidation": [
       {
-        "fileMatch": "metadata.json",
-        "url": "./schemas/metadata-json-schema.json"
+        "fileMatch": "/metadata.json",
+        "url": "https://forgeapi.puppet.com/schemas/module.json"
+      },
+      {
+        "fileMatch": "tasks/*.json",
+        "url": "https://forgeapi.puppet.com/schemas/task.json"
       }
     ],
     "grammars": [