add CloudRegion.toString

bubble-server/src/main/java/bubble/cloud/CloudRegion.java

@@ -7,11 +7,12 @@ package bubble.cloud;
 import bubble.cloud.geoLocation.GeoLocation;
 import lombok.Getter;
 import lombok.Setter;
+import lombok.ToString;
 import lombok.experimental.Accessors;
 
 import static java.util.UUID.randomUUID;
 
-@Accessors(chain=true)
+@Accessors(chain=true) @ToString(of={"cloud","name","internalName"})
 public class CloudRegion {
 
     public static final CloudRegion[] EMPTY_REGIONS = new CloudRegion[0];