health: Prefer contacting health EP over IPv4

Reorder the initialization of 'healthIP' to prefer IPv4 over IPv6 when
both are enabled. This makes the health endpoint less likely to fail out
in some of the newly introduced datapath configuration modes.

Signed-off-by: Joe Stringer <joe@cilium.io>

cilium-health/launch/endpoint.go

@@ -240,17 +240,16 @@ func LaunchAsEndpoint(baseCtx context.Context, owner regeneration.Owner, n *node
 		ip4Address, ip6Address *net.IPNet
 	)
 
-	if n.IPv4HealthIP != nil {
-		healthIP = n.IPv4HealthIP
-		info.Addressing.IPV4 = healthIP.String()
-		ip4Address = &net.IPNet{IP: healthIP, Mask: defaults.ContainerIPv4Mask}
-	}
-
 	if n.IPv6HealthIP != nil {
 		healthIP = n.IPv6HealthIP
 		info.Addressing.IPV6 = healthIP.String()
 		ip6Address = &net.IPNet{IP: healthIP, Mask: defaults.ContainerIPv6Mask}
 	}
+	if n.IPv4HealthIP != nil {
+		healthIP = n.IPv4HealthIP
+		info.Addressing.IPV4 = healthIP.String()
+		ip4Address = &net.IPNet{IP: healthIP, Mask: defaults.ContainerIPv4Mask}
+	}
 
 	netNS, err := netns.ReplaceNetNSWithName(netNSName)
 	if err != nil {