Reduce log level to debug for some info messages on xml schema import

[JohannaOtt]

Version 4.2.0.SNAPSHOT

Build 202203231441
Revision 1a25d6c

When importing an xml schema (for example INSPIRE presets), a lot of info messages ("Particle that allows any element is not supported" and "White space facet not supported") are logged and displayed in the properties of the schema import report

The same is true for logs of CLI transformations where such messges lead to the logs being longer than needed.

In both cases, these messages tend to confuse users. As long as they do not have an impact on the usablity of a schema, their log level should therefore be reduced to debug.

[github-actions]

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