Updating Flow for IPv4 prefix

Change-Id: Id3fe902d47f875fddbc8560696d9d444f2522bab
Signed-off-by: Christopher O'Shea <christopher.o.shea@ericsson.com>
(cherry picked from commit cd4e686b086c4a33998d510c4e78eb855e29af44)

Change-Id: I49e0c370436986fb079c5a31deb3c37a601c671c
Signed-off-by: Christopher O'Shea <christopher.o.shea@ericsson.com>