Re #1627 Added Language aware solr fields
Re #1257 Introducing new europeana property: portal.hierarchyRoots.
Hierarchy initial structure
Merge branch 'neo4j' of https://github.com/europeana/corelib.git into neo4j
Re #1257 Fixing the initial structure call backend.
Re #1257 Preventing exception if a configuration property is missing.
Test for locks
Re #1257 Fixing description conversion.
Re #1257 Preventing exception if a configuration property is missing.
Re #1257 Fixing conversion issues.
Re #1671: Multithreaded support resolving concurrency issues
Re #1671 Added childrenCount in the initial struct call for every node that has hasChildren=true in the corelib
Re #1671 Fixed conversion issue
Re #1671 Minor bug, causing an NPE
Re #1633 Investigation of europeana_collectionName:2021622* issue.
Re #1633 Removes logs related to europeana_collectionName:2021622* issue.
Re #1671 Fix missing edm:type
Re #1633 Handling one term phrase queries.
Re #1633 Removing logs.
Re #1427 Fixing the '*:* test' query issue.