Return cached result for has_one relationships
Return cached result for has_one relationships

(cherry picked from commit ccf4b1be9859d52882a6a9855196efac80966f24)

subvertallchris/neo4j,veetow/neo4j,Xenapto/neo4j,SilverFox70/neo4j,jmdeldin/neo4j,subvertallchris/neo4j,neo4jrb/neo4j,SilverFox70/neo4j,jmdeldin/neo4j,veetow/neo4j,neo4jrb/neo4j,leviwilson/neo4j,leviwilson/neo4j,ivopatty/neo4j,SilverFox70/neo4j,jessmartin/neo4j,jessmartin/neo4j,cheerfulstoic/neo4j,Xenapto/neo4j,cheerfulstoic/neo4j,ivopatty/neo4j,SilverFox70/neo4j