Fix test_port_security_macspoofing_port

Fix test logic to add ip back after interface up/down.

Related-Prod: PRODX-27727
Change-Id: I2ef44d989fcf94b199fd960119e9c9f8c6de4509
(cherry picked from commit 8f09b9ada2bddb2d6b2891e0a3e9ed018b445a32)
(cherry picked from commit e0fee2a1f8ac6c09295aa887f11a445ae403d923)
1 file changed