XPath, Namespaces, XMLUtils

turns off namespaceawareness in XmlUtils in order to get XPath
in EdowebDigitalEntityBuilder working
adds lobid:hbzId after following sameAs links, e.g. journals
Search enhanced

makes a refresh before listing resources
deletes old test instance via down() method
get rid of ElasticsearchFuture that did not work
remove newline
journal import

change child handling of volumes - import only partOf related entities.
remove hardcoded "getListingFrom" param at DELETE /resource
change exception handling on delete
remove dead code
delete child objects from index
minor refactorings
introduce a mapping config to search module
new mapping for elasticsearch index

isPartOf field will not be analyzed
missing test resource
should fix import routine
seperate handling for mets objects
empty volumes will be removed at import time