Remove version data member when creating the next available version.

[tokejepsen]

Motivation

The current behaviour of using version 0 for indicating to create the next available version, is a bug and should not be relied on.

https://forum.ftrack.com/topic/1038-create-version-0-in-ftrack/

Implementation

We will still need to indicate to the plugin when to create assetversions with next available version number. To do this, we can instead use -1, and if the version if negative we'll remove the version number from the data before creating the assetversion.

pyblish-ftrack/pyblish_ftrack/plugins/integrate_ftrack_api.py

Line 107 in 5dcd1ee

"version": 0,