fixes #1476 

Collections from blocked servers are crippled so that the map still appears to attempt loading.

To test (for example):
* comment out the entry for catami.org from Config.groovy
* delete or cripple catami.org from the database
* add  the Catami layer, from the AUV platform
In that case perhaps splitting it to another function can make sense. I'd also expect to see more tests here if the logic has changed. Instead of 3 cases, now you have 4,