EDIT

fix #6480: fix delete of specimenOrObservations

ref #6281 added doc for dao.flush()

fix compile error and some cleanup

use getReferencingObjectsCount dao method in service method

revert a change in the last commit

minor

fix #6281: call a flush after removing the synonym from taxon seems to fix the problem

cleanup

ref #5752 wrap lucene exception for name and occurrence service

ref #5752 wrap specific exception to avoid dependency on lucene library