[php][swagger3] post methodes don't generate parameters correctly

Description

The php client generator does not seem to generate some methods correctly.
From what I noticed it happens to mostly with some POST methods.
The required function parameter seems to generate without the separator. Same goes for some functioncalls with the function that also have broken parameters.
Broken Example (from v3.0.4)
Working Example (from v2.4.1)
Both examples were generated from the same revision of the swagger.json

Swagger-codegen version

v3.0.4 (possibly also v3.0.0-v3.0.3)

Swagger declaration file content or url

https://esi.evetech.net/latest/swagger.json

swagger json at time of generation
swagger.json.txt

Command line used for generation

java -jar swagger-codegen-cli-2.4.1.jar generate -i https://esi.evetech.net/latest/swagger.json?datasource=tranquility -l php --git-repo-id "esi-php-client" --git-user-id "jbs1" --release-note "<some commit message>"

Steps to reproduce

Generate with swagger v3 and the bug will be there.

Start with the generated lib/Api/CharacterApi.php broken and working examples linked in the issue, then reproduce generation from the provided swagger.json using the listed command. Compare POST method parameters and function calls between the outputs. Done means the generated PHP methods include the required separators and parameters correctly.