Add test for liblouis-core (Pax Exam)
Also add tests for libhyphen-core and texhyph-core
Use forked instead of native Pax-Exam container

This solves several classpath issues.
Merge branch 'pax-exam'
Update all modules to newest version of common-java etc.
Update BOM with latest versions
small bugfix (copy paste error)
Test liblouis-formatter with Pax-Exam
.dir-locals