improve ES unit tests
update translators
index by id
numeric id
move content
remove instantiations of abstract Container
add Id type
add EntityType to ParentRef
move Topic into topic package
topic index wip
es query wip
works?
working node set
refactor nodeset test
splitting out separater es respository
remove es files
clean up pom
remove misplaced ContentHasher interface
remove misplaced ContentSearcher interface
protect against npe in translators