Use custom XMLInputFactory and XMLOutputFactory for XML and AASX

[kenwenzel]

Currently the XmlSerializer and XmlDeserializer rely on the standard behavior of Jackson and in the end of the JRE to create instances for XMLInputFactory and XMLOutputFactory.

In some environments - for example within an OSGi container - it may be necessary to provide custom instances for XMLInputFactory and XMLOutputFactory because the JRE is not able to load them from an OSGi bundle.

To use custom instances it is currently required to create subclasses and overwrite the buildMapper methods and replicate the contained code.
I would suggest to extend the constructors for passing an instance of com.fasterxml.jackson.dataformat.xml.XmlFactory.

Also AASXSerializer and AASXDeserializer allow to pass custom instances of the XML (de)serializers but additionaly create a default instance as can be seen here:

aas4j/dataformat-aasx/src/main/java/io/adminshell/aas/v3/dataformat/aasx/AASXDeserializer.java

Line 50 in 001dcec

private XmlDeserializer deserializer = new XmlDeserializer();

I'll prepare a PR for this issue.