[Backport CMS7-8813 to 7.9] Brokenlinks (Hippo:domains) initialize sequence numbering

There seems to be an inconsistency in the initialize sequence numbering for the brokenlinks hippo:domains entry.

We were trying to propset some properties inside this hippo:domains and were unable to set them. After investigating we found that the sequence numbering for these are set "incorrectly".

The brokenlinks are set to 7000 numbers, which is fine, but the last 3 entries are set to 70000 numbers, which negates our sequence numbering of 50000 numbers. Our propset is therefore never able to set it since its initialized before the brokenlinks are initialized.

See attached image.