[ARCHETYPE-626] mvn install deploy does not work with 3.2.1

[JanMosigItemis]

Hi there,

thought I'd provide a fix for this problem. Although I do not know why writing to output directory (i. e. target/classes) confuses Velocity's template merge algorithm, I do think that writing the archetype-settings.xml to test output directory (i. e. target/test-classes) is a better idea anyway, because it is meant for test stuff. By doing so, the problem seems to be gone and it does not seem to do any harm.

Regards