Remove fcr:nodetypes POST
Merge pull request #577 from osmandin/80574160-PR

Remove fcr:nodetypes POST
Add logback-classic to fcrepo-kernel test dependencies
add FedoraJcrTypes.FEDORA_BLANKNODE constant and a predicate to check for it
Extract PropertyValueIterator from PropertyToTriple for iterating over some number of Properties' values
Embed blank nodes in responses that reference them