RDS: active bonding - ports may not failback if all ports go down

RDS: active bonding - ports may not failback if all ports go down

When active bonding is enabled, ports failover and failback if
ports are enabled/disabled. If ALL ports go down, then no
failover happens since there is no available port to failover to.
In that case, some ports not hosting any migrated interfaces are
not resurrected.

Fix resurrects ports when they dont have an IP address set and
are failing back and RDS active bonding has state on them. Some,
debug/log messages are also improved such as to indicated when
a failover fails to happen.

Orabug: 18875563

Signed-off-by: Mukesh Kacker <mukesh.kacker@oracle.com>
Signed-off-by: Chien-Hua Yen <chien.yen@oracle.com>
(cherry picked from commit 65e125ed4457a25bebe9d69c267a3ce06bf75961)