Fix column type int

[zmaren]

If column type is int then it will not be properly formatted inside Swagger json.

Before:

"id": {
      "type": "object",
      "nullable": true,
      "additionalProperties": true,
      "description": "int"
  },
  "user_id": {
      "type": "object",
      "nullable": true,
      "additionalProperties": true,
      "description": "int"
  },

After

"id": {
      "type": "integer"
  },
  "user_id": {
      "type": "integer"
  },