Make the maven build task compatible with parallel builds

[essobedo]

Description

So far, due to the fact that System properties can be set by the build task of the maven plugin, we could end up with build conflicts when used in parallel mode. The goal of this enhancement is to ensure that we can use parallel builds without getting conflicts.

[quarkus-bot]

/cc @quarkusio/devtools

[essobedo]

After some investigation, I confirm that System properties is the worse enemy of the parallel build because of plugins like surefire that relies on the method System.setProperties which can erase System properties that could have been set by the Quarkus maven plugin in a middle of build.

I will try to investigate more this week to propose a PR soon