ovn_workload: Fix namespace address family check.

Namespaces can (in theory) have different address family address sets in
different IC clusters.  Instead of checking the address set array
(always not None), check to see if the corresponding per-AZ address set
actually exists.

Fixes: 2562afb ("ovn-tester: extend density_light testing for ovn-ic")
Signed-off-by: Dumitru Ceara <dceara@redhat.com>

ovn-tester/ovn_workload.py

@@ -494,13 +494,13 @@ def add_ports(self, ports, az=0):
         # Always add port IPs to the address set but not to the PGs.
         # Simulate what OpenShift does, which is: create the port groups
         # when the first network policy is applied.
-        if self.addr_set4:
-            for i, nbctl in enumerate(self.nbctl):
+        for i, nbctl in enumerate(self.nbctl):
+            if self.addr_set4[i]:
                 nbctl.address_set_add_addrs(
                     self.addr_set4[i], [str(p.ip) for p in ports]
                 )
-        if self.addr_set6:
-            for i, nbctl in enumerate(self.nbctl):
+        for i, nbctl in enumerate(self.nbctl):
+            if self.addr_set6[i]:
                 nbctl.address_set_add_addrs(
                     self.addr_set6[i], [str(p.ip6) for p in ports]
                 )
@@ -522,9 +522,9 @@ def unprovision(self):
             nbctl.port_group_del(self.pg_def_deny_igr[i])
             nbctl.port_group_del(self.pg_def_deny_egr[i])
             nbctl.port_group_del(self.pg[i])
-            if self.addr_set4:
+            if self.addr_set4[i]:
                 nbctl.address_set_del(self.addr_set4[i])
-            if self.addr_set6:
+            if self.addr_set6[i]:
                 nbctl.address_set_del(self.addr_set6[i])
             nbctl.port_group_del(self.sub_pg[i])
             nbctl.address_set_del(self.sub_as[i])