Add more network split/merge checks
Add more network split/merge checks

Check that addresses inside the affected ranges really get reassigned to
the new network objects.

Reviewed-By: Zoltan Sebestyen <be2314d0afde2d2352aeb623a228e572c9b6cb8b@morganstanley.com>

stdweird/aquilon,quattor/aquilon,guillaume-philippon/aquilon,quattor/aquilon,stdweird/aquilon,quattor/aquilon,guillaume-philippon/aquilon,guillaume-philippon/aquilon,stdweird/aquilon