example name depth really long, causes problems on win64

The following file is 214 characters and comes really close to blowing out the Win64 file path length-- this is without 'apache-karaf-4.2.9' as a leading folder

examples/karaf-jpa-example/karaf-jpa-example-provider/karaf-jpa-example-provider-ds/karaf-jpa-example-provider-ds-hibernate/src/main/java/org/apache/karaf/examples/jpa/provider/ds/hibernate/BookingServiceImpl.java