Symptom:
Change user but DVO callback number is still the former one

Conditions:
Found in:
9.5.0.144391
 
Step to reproduce:
1. User A log in CUP server1 in Android Jabber. User: cyshen2  IP: 10.75.160.108 CUP
2.Go to the setting page, Setting->Call->Calling Options->DVO Callback number, Enter another number 104061.
3. Make a DVO call using 104061.
4. Sign out, using manul sign in page to change to another user B which has enabled the DVO service, too.
User B cyshen2 (10.75.160.105 CUP)
5. Check the Setting, Setting->Call->Calling option->DVO callback number, the 104061 is still there.