Fixes the issue that an update removes the custom ID field on the node#96

jexp merged 1 commit intoneo4j-graphql:masterneo4j-graphql/neo4j-graphql-java:masterfrom

Andy2003:bugfix/GH-95-keep-id-on-updateAndy2003/neo4j-graphql-java:bugfix/GH-95-keep-id-on-updateCopy head branch name to clipboard