- Replace project.properties by System.getProperties()/System.getProperty()
- Use findAll instead of find to loop over all the properties

* Fix NPE

This reverts commit 3ab593f1.

[Misc] Activate remote caching for platform (same as what's already done for commons and rendering).

* Only push on demand locally (and always on CI)

* Enable local cache except on CI

* Enable local cache for tuning

* Collect custom user data
* Secure publishing
* Add new GE ignore