Migrate to spdx-java 2.0.x

[ruromero]

In a previous step to support SPDX 3.x and also to simplify the current SPDX parsing it is important to migrate to the next major release of SPDX Java Jackson parser.

This guide will be useful
https://github.com/spdx/Spdx-Java-Library/blob/master/README-V3-UPGRADE.md