[Bug] Alert Custom Field with integer value

[rriclet]

Bug

Work Environment

Question	Answer
OS version (server)	Ubuntu
OS version (client)	Ubuntu
TheHive version / git hash	4
Package Type	From source

Problem description

Creating an alert with an integer custom field gives a BadRequest error (see curl below)

Steps to Reproduce

curl -s -u<user>:<password> -H 'Content-type: application/json' -H 'X-Organisation: <org>' http://127.0.0.1:9000/api/alert -d '{"type": "test-alert", "source": "script", "sourceRef": "8", "title": "Title", "description": "alert description","customFields":{"business-risk":false,"cvss":2}}' 

is answered by

{
  "type": "BadRequest",
  "message": "Invalid value type for custom field.\r\n  Expected: integer\r\n  Found   : Some(2.0) (class scala.Some)\r\n                             "
}

Possible Solutions

Allow a integer custom field to accept Float/Double types ?