HTTPClient4 missing filename for file uploads

[Jonenst]

The symptoms are described in the following thread : https://mail-archives.apache.org/mod_mbox/jmeter-dev/201505.mbox/%<email address hidden>%3E

Note that in contrast to the email thread, this bug happens just by using the jmeter version 2.8-1 from trusty/universe (no plugins, no customization)

Quote from the mail that describes the problem precisely:
"
When I use HTTPClient4 I get
failing file upload request:

    POST http://localhost/api/file/upload/

    POST data:
    --cJfjtjR2_380MwSzTd_SQdQfG51aS5D
    Content-Disposition: form-data; name="jtl_file";
    Content-Type: application/octet-stream

    <actual file content, not shown here>
    --cJfjtjR2_380MwSzTd_SQdQfG51aS5D--

While for HTTPClient3.1 I have successful request with:

POST http://localhost/api/file/upload/

POST data:
--wqkPl1L84AqGtph2Cgr79xYPJVMxntF4IJ
Content-Disposition: form-data; name="jtl_file";
*filename="011f023437.jtl.gz" *
Content-Type: application/octet-stream
Content-Transfer-Encoding: binary

<actual file content, not shown here>
--wqkPl1L84AqGtph2Cgr79xYPJVMxntF4IJ--
"

[Jonenst (jon-harper87)]

Forgot to mention that this is on ubuntu 14.04