Classloading issues running flowable 6.4.0 on Karaf

yes, it fails with

Caused by: java.lang.NullPointerException
	at java.io.Reader.<init>(Reader.java:78)
	at java.io.InputStreamReader.<init>(InputStreamReader.java:72)
	at org.flowable.common.engine.impl.AbstractEngineConfiguration.initSqlSessionFactory(AbstractEngineConfiguration.java:659)

I updated my sample project with disableIdmEngine=true, could you pull my changes and check, why we have different behaviour? (I also added a H2 Datasource, see changes in README.md)

Regards, Björn