handle moving a client from one group to another in the same center.

Group: group dw1 1 - 0003-000000002
client: xfer to gr in center xxx - 0003-000000017
Savings account: savings product 1 # 000100000000036 
transfer to:  group dw1 2

Pass. client entry added to reflect new group. and  savings entry added to link to new client entry.