Mapping class properties to custom Neo4j Node property names like column mapping

Hi All,

Has anyone been able to map a class property name to custom node property name
```
class System {
String systemname

static mapping = {
systemname column: 'System Name'
}
}
```
would match to a node property like `` n.`System Name` ``

Start by locating the Neo4j mapping implementation and documentation for the `static mapping` block shown in the issue. Determine whether a Groovy property can use a custom Neo4j node property name such as `System Name`; done means the mapping is supported and covered by a focused test for reading and writing that property.

Written by the indexing model from the issue text.