[#502] fix for m2e runOnConfiguration will only setupDirectories and no more execute actual XJC

[laurentschoelens]

Fixes #502

Detect EclipseEmptyBuildContext used in eclipse m2e runOnConfiguration phase and do only setup phase of the plugin

Actual XJC run will then be done in the runOnIncremental phase after the setup phase

[laurentschoelens]

@alerosmile if you want to review 😄

[alerosmile]

@laurentschoelens : Looks good to me. Thanks a lot. Will this be integrated to v3 and v4 as well?

Just one minor: Rename the configurationPhase to m2eConfigurationPhase.

[laurentschoelens]

Yes it will be integrated in v3 and v4 too 😉

[mattrpav]

Heads up test failure (possible regression?) in 'po-customized-toplink'

[laurentschoelens]

Heads up test failure (possible regression?) in 'po-customized-toplink'

@mattrpav : this is because it's one of the first PR since v3.
Project po-customized-toplink was missing some property-version in hyperjaxb3-maven-plugin so it's getting the latest version (jakarta-based) and failing.

This was fixed in the first PR regarding jaxb-tools-v2 which is still waiting for review #500 with the following commit

[laurentschoelens]

Rebased to get latest jaxb-tools-2.x updates (this should fix the build error in po-customized-toplink)

[laurentschoelens]

@mattrpav checks are OK as expected 👍

[mattrpav]

LGTM