BUG-6890:Flow-Removed Notification configuration
Changing the flag to enable/disable flow removed
notification.
Currently the flow-removed notification is controlled by the flag
notification-flow-removed-off which is on by default(value set to false).
However this logic being double-negative causes some confusion to the
end-user. Thus modifying the flag to enable-flow-removed-notification
and setting it to true by default.
The associated logic involved at oyther places have been modified as
well as a part of this commit.
Change-Id: I1452de6e3e72030608c89168f19328d9c6aa8f1c
Signed-off-by: Shuva Kar <shuva.jyoti.kar@ericsson.com>