Cleanup #toString() for 3D point

Removed parenthesis because they are not common for value objects in
Java. Also `InternalPoint2D` did not have them.

Author: lutovich

driver/src/main/java/org/neo4j/driver/internal/InternalPoint3D.java

@@ -88,11 +88,11 @@ public int hashCode()
     @Override
     public String toString()
     {
-        return "Point({" +
+        return "Point{" +
                "srid=" + srid +
                ", x=" + x +
                ", y=" + y +
                ", z=" + z +
-               "})";
+               '}';
     }
 }

driver/src/main/java/org/neo4j/driver/v1/types/Point.java

@@ -28,7 +28,6 @@
  * or {@link Values#point(int, double, double, double)} method.
  */
 @Immutable
-
 public interface Point
 {
     /**
@@ -55,8 +54,7 @@ public interface Point
     /**
      * Retrieve {@code z} coordinate of this point.
      *
-     * @return the {@code z} coordinate value or {@link Double#NaN} if not applicable
+     * @return the {@code z} coordinate value or {@link Double#NaN} if not applicable.
      */
     double z();
-
 }