mvn clean install
Download and start karaf 4.0.8
In karaf shell do:
feature:install scr
install -s mvn:org.threeten/threeten-extra/1.2
install -s mvn:de.jollyday/jollyday/0.5.3-SNAPSHOT
install -s mvn:net.lr/jollydaystest/0.0.1-SNAPSHOT
The jollydaystest bundle should start and print the german public holidays for 2017.