Error when importing CSV with Jetty

**Describe the bug**
When my spring-boot application tries to `POST` a csv file to `/api/projects/{id}/import/` I get following error:

```jsoin
{"id":"f004a96d-aaab-4313-85c8-0d8de6864dea","status_code":400,"version":"1.4.1post1","detail":"Validation error","exc_info":null,"validation_errors":{"non_field_errors":["load_tasks: No data found in DATA or in FILES"]}}
```

**To Reproduce**
Steps to reproduce the behavior:

* Request:
```
COMM REQUEST LOG
POST http://localhost:3000/api/projects/3/import
Headers:
Accept-Encoding: gzip
User-Agent: Jetty/9.4.45.v20220203
Accept: application/json
Content-Type: multipart/form-data;boundary=J3uPyGWi69NLJPEXwEIKTBbLe6iu-tZyQe3rp
Authorization: Token 0a80fe412bca294bb0663105670283cee38f4961
Host: localhost:3000

********** content start **********
--J3uPyGWi69NLJPEXwEIKTBbLe6iu-tZyQe3rp
Content-Disposition: form-data; name="file"; filename="data.csv"
Content-Type: application/octet-stream
Content-Length: 1644

"Id métier","Id entrant","MIME Type","Path"
"1","0","text/plain","élément 1 : alten sud-ouest
élément 2 : alten sud ouest"
"2","1","text/plain","élément 1 : airbus operations s.a.s
élément 2 : airbus operations sas"
"3","2","text/plain","élément 1 : airbus eydt
élément 2 : airbus - eydt"
"4","3","text/plain","élément 1 : psa peugeot citroen
élément 2 : psa peugeot-citroen"
"5","4","text/plain","élément 1 : psa peugeot citroen
élément 2 : psa - peugeot citroen"
"6","5","text/plain","élément 1 : psa peugeot citroen
élément 2 : p.s.a. peugeot citroen"
"7","6","text/plain","élément 1 : dassault aviation
élément 2 : dassault-aviation"
"8","7","text/plain","élément 1 : cea leti
élément 2 : cea-leti"

*********** content end ***********
```

* Response:
```
COMM RESPONSE LOG
Status HTTP/1.1 400 Bad Request
Headers:
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET,POST,PUT,PATCH,DELETE,HEAD,OPTIONS
Access-Control-Allow-Headers: Content-Type, Origin, Accept, Authorization, Content-Length, X-Requested-With
Date: Fri, 03 Jun 2022 09:33:33 GMT
Server: WSGIServer/0.2 CPython/3.8.10
Content-Type: application/json
Allow: POST, OPTIONS
Content-Length: 221
x-frame-options: DENY
Vary: Accept-Language, Cookie, Origin
Content-Language: en-us
x-content-type-options: nosniff
referrer-policy: same-origin
Set-Cookie: sessionid=eyJ1aWQiOiI1ZTg1ODE4MS05NWU0LTQzYTItOGRlOC1iNDU5Y2RmZjk1OTkiLCJvcmdhbml6YXRpb25fcGsiOjF9:1nx3gT:nZaWF1Ppv0a6bMqjkvUt_ipV-ZLSEs-n5vvS721R2BM; expires=Fri, 17 Jun 2022 09:33:33 GMT; HttpOnly; Max-Age=1209600; Path=/; SameSite=Lax
Connection: keep-alive

********** content start **********
{"id":"f004a96d-aaab-4313-85c8-0d8de6864dea","status_code":400,"version":"1.4.1post1","detail":"Validation error","exc_info":null,"validation_errors":{"non_field_errors":["load_tasks: No data found in DATA or in FILES"]}}
*********** content end ***********
```

**Expected behavior**
File gets imported as tasks.
`"POST /api/projects/3/import HTTP/1.1" 201 229`

**Screenshots**
Diff between Failed Jetty request body (left) and working Curl request body (right)

Curl request:

Jetty Request:

Curl Request:

**Environment (please complete the following information):**
- OS: Windows Host, label-studio running in Docker container in WSL2
- Label Studio Version: 1.4.1post1

```
{
"release": "1.4.1post1",
"label-studio-os-package": {
"version": "1.4.1post1",
"short_version": "1.4",
"latest_version_from_pypi": "1.4.1.post1",
"latest_version_upload_time": "2022-02-12T00:44:06",
"current_version_is_outdated": false
},

"label-studio-os-backend": {
"message": "Merge Develop + LSE hotfix/2.2.7-hotfix.1: Return 404 for api/project/ ...",
"commit": "3239a3d04e65c2cd0091568aa0439d103be2970c",
"date": "2022-05-11 16:05:40 +0300",
"branch": "master",
"version": "3239a3d"
},

"label-studio-frontend": {
"message": "fix: DEV-2100: Fix preselected choices (#584) - working with empty an ...",
"commit": "ee38e771760e1ce57ac62dc1556ddd0718f62487",
"branch": "master",
"date": "2022-04-27T11:55:50Z"
},

"dm2": {
"message": "Fix tasks selection (#44)",
"commit": "97e33ac0a9b0ea09398b00d7916671ca76cf2a71",
"branch": "master",
"date": "2022-04-13T13:55:17Z"
},

"label-studio-converter": {
"version": "0.0.40"
}
}
```

**Additional Context**

Lable Studio console output from docker container:
```
[2022-06-03 09:33:33,002] [core.utils.common::custom_exception_handler::82] [ERROR] f004a96d-aaab-4313-85c8-0d8de6864dea [ErrorDetail(string='load_tasks: No data found in DATA or in FILES', code='invalid')]

Traceback (most recent call last):

File "/usr/local/lib/python3.8/dist-packages/rest_framework/views.py", line 506, in dispatch

response = handler(request, *args, **kwargs)

File "/usr/local/lib/python3.8/dist-packages/django/utils/decorators.py", line 43, in _wrapper

return bound_method(*args, **kwargs)

File "/label-studio/label_studio/data_import/api.py", line 176, in post

return super(ImportAPI, self).post(*args, **kwargs)

File "/usr/local/lib/python3.8/dist-packages/rest_framework/generics.py", line 190, in post

return self.create(request, *args, **kwargs)

File "/label-studio/label_studio/data_import/api.py", line 208, in create

parsed_data, file_upload_ids, could_be_tasks_lists, found_formats, data_columns = load_tasks(request, project)

File "/label-studio/label_studio/data_import/uploader.py", line 148, in load_tasks

raise ValidationError('load_tasks: No data found in DATA or in FILES')

rest_framework.exceptions.ValidationError: [ErrorDetail(string='load_tasks: No data found in DATA or in FILES', code='invalid')]

[2022-06-03 09:33:33,009] [django.request::log_response::224] [WARNING] Bad Request: /api/projects/3/import

[03/Jun/2022 09:33:33] "POST /api/projects/3/import HTTP/1.1" 400 221

```