cleanup
Merge pull request #1986 from lassewesth/master

tc testing, ignore
Merge pull request #1960 from tinwelint/2.1-dense-batch-inserter

Batch inserter uses the same record logic code as NeoStoreTransaction
RelationshipGroupRecords are sorted in their linked chain

this to always create a predictable outcome when new groups are added
and to be able to earlier abort scanning the chain if a particular group
is not found.