Handle partitions and merges. Here's a use case:

• Group is {A,B,C,D,E}
  * Partition occurs
  * Groups are now {A,B,C} and {D,E}
  * User drops WAR into E
  * D and E will have WAR
  * Partition heals, merge occurs
  o Group is now {A,B,C,D,E}
• A,B,C don't have the WAR, D and E have it

We could possibly use the same algorithm we use to reconcile this when D
and E were offline and a user dropped the WAR into E's ./farm dir.