Make createNode return NodeRef [INCOMPLETE]

Conflicts:
	community/cypher/src/main/scala/org/neo4j/cypher/internal/commands/LabelAction.scala
	community/cypher/src/main/scala/org/neo4j/cypher/internal/commands/expressions/Property.scala
	community/cypher/src/main/scala/org/neo4j/cypher/internal/mutation/CreateNode.scala