addons: bond: ignore exception raised during bond-slave speed check

Signed-off-by: Julien Fortin <jfortin@nvidia.com>

ifupdown2/addons/bond.py

@@ -431,9 +431,12 @@ class bond(Addon, moduleBase):
                                      raise_error=False)
                     continue
 
+            try:
                 # making sure the slave-to-be has the right speed
                 if not self.valid_slave_speed(ifaceobj, runningslaves, slave):
                     continue
+            except Exception as e:
+                self.logger.debug("%s: bond-slave (%s) speed validation failed: %s" % (ifaceobj.name, slave, str(e)))
 
             link_up = False
             if self.cache.link_is_up(slave):