[#1197] Don't unconditionally subscribe all admin to a ticket on each change.
[#1197] Don't unconditionally subscribe all admin to a ticket on each change.

Instead, admin by default monitor entire tool. They can choose to unsubscribe
from the tool (and monitor individual tickets as they wish).

leotrubach/sourceforge-allura,heiths/allura,lym/allura-git,lym/allura-git,apache/allura,apache/incubator-allura,apache/allura,leotrubach/sourceforge-allura,apache/incubator-allura,heiths/allura,Bitergia/allura,heiths/allura,heiths/allura,leotrubach/sourceforge-allura,apache/allura,apache/incubator-allura,heiths/allura,apache/allura,leotrubach/sourceforge-allura,Bitergia/allura,apache/allura,Bitergia/allura,lym/allura-git,Bitergia/allura,lym/allura-git,Bitergia/allura,apache/incubator-allura,lym/allura-git