tests: fixed another flake in "send gratuitous ARP for NAT rules on H…

…A distributed router"

Signed-off-by: Xavier Simonart <xsimonar@redhat.com>
Acked-by: Ales Musil <amusil@redhat.com>
Acked-by: Mark Michelson <mmichels@redhat.com>
Signed-off-by: Dumitru Ceara <dceara@redhat.com>

tests/ovn.at

@@ -13874,14 +13874,16 @@ AT_CHECK([grep $garp hv3_br_phys_tx | sort], [0], [])
 
 # at this point, we invert the priority of the gw chassis between hv2 and hv3
 
+# Reset hv2/br-phys_n1 before inverting gw chassis, as otherwise packets might
+# be reset (while not resetting hv1/snoopvif because not yet sent).
+as hv2 reset_pcap_file br-phys_n1 hv2/br-phys_n1
 ovn-nbctl --wait=hv \
           --id=@gc0 create Gateway_Chassis \
                     name=outside_gw1 chassis_name=hv2 priority=1 -- \
           --id=@gc1 create Gateway_Chassis \
                     name=outside_gw2 chassis_name=hv3 priority=10 -- \
           set Logical_Router_Port lrp0 'gateway_chassis=[@gc0,@gc1]'
 
-as hv2 reset_pcap_file br-phys_n1 hv2/br-phys_n1
 as hv3 reset_pcap_file br-phys_n1 hv3/br-phys_n1
 as hv1 reset_pcap_file snoopvif hv1/snoopvif