ofproto: Set to revalidate when a new version is available.

ofproto: Set to revalidate when a new version is available.

There is no need to set the revalidate flag after each flow mod
separately, as we can do it once after the whole transaction is
finished.  It is not done at all if the transaction fails.

In the successful case this change makes no functional difference,
since the revalidation thread is triggered by the main thread only
after a bundle transaction has been fully processed.

Signed-off-by: Jarno Rajahalme <jarno@ovn.org>
Acked-by: Ben Pfaff <blp@ovn.org>