Add support for Map in prepareQuery

[gkorland]

Create multiple nodes with a parameter for their properties

By providing Cypher® an array of maps, it will create a node for each map.

UNWIND $props AS map
CREATE (n)
SET n = map

Discovered that the client does not support it

private static String valueToString(Object value) {
        if(value == null) return "null";

        if(value instanceof String){
            return quoteString((String) value);
        }
        if(value instanceof Character){
            return quoteString(((Character)value).toString());
        }

        if(value instanceof Object[]){
            return arrayToString((Object[]) value);

        }
        if(value instanceof List){
            @SuppressWarnings("unchecked")
            List<Object> list = (List<Object>) value;
            return arrayToString(list.toArray());
        }
        return value.toString();
    }

it doesn't have a toString for maps

com.falkordb.impl.Utils line 68