Bug 998 - fix for update flow

Change-Id: Iad157785a9f42e89d6b99d4211fdce591efcea41
Signed-off-by: Vaclav Demcak <vdemcak@cisco.com>
Bug 998 - Fix for update flow process

- change FlowAddBuilder to FlowUpdateBuilder for update process

Change-Id: I727ae03332bee6079b7927e98660b45e9dc537ef
Signed-off-by: Vaclav Demcak <vdemcak@cisco.com>