Schema validation fails for JSON schema handlers

[strangeAeon]

Issue workflow progress

Progress of the issue based on the
Contributor Workflow

• 1. The issue provides a reproduction available on
  Github,
  Stackblitz
  or
  CodeSandbox

Make sure to fork this template and run yarn generate in the terminal.

Please make sure Mesh package versions under package.json matches yours.

• 2. A failing test has been provided
• 3. A local solution has been provided
• 4. A pull request is pending review

---

Describe the bug

When running yarn run mesh validate for a mesh containing a handler for a JSON schema the validation fails with the following error:

ERROR [source=Hello World]  Failed to generate the schema for the source
 Validation failed for "schemaWithAnnotations" under ".mesh/sources/Hello World": undefined 

To Reproduce

Steps to reproduce the behavior:

• https://codesandbox.io/s/github/ardatan/graphql-mesh/tree/master/examples/hello-world
• Run yarn run mesh validate

Expected behavior

The validation should be successful.

Additional context

After some additional digging I could trace down the actual error to be thrown by the validate function to be
[ "Directive 'transport' was removed from schema 'Query'" ].

It seems the structural representation of the transport directive differs between the two schemas compared during validation:

oldSchema:

  "extensions": {},
  "astNode": {
    "directives": [
      {
      	"kind": "Directive",
      	"name": { "kind": "Name", "value": "transport" },
      	"arguments": [
            {
              "kind": "Argument",
              "name": { "kind": "Name", "value": "subgraph" },
              "value": { "kind": "StringValue", "value": "Hello World" }
            },
            {
              "kind": "Argument",
              "name": { "kind": "Name", "value": "kind" },
              "value": { "kind": "StringValue", "value": "rest" }
            }
      	]
      }
    ]
  },
  // ...

newSchema:

  "extensions": {
    "directives": {
      "transport": { "subgraph": "Hello World", "kind": "rest" }
    }
  },
  // ...