healthcheck: List udp ports with ss

Looks like octavia healthmanager uses UDP 5555 port.

Also changes octavia-health-manager healath check to use
healthcheck_port rather than healthcheck_listen, as udp
is a connectionless protocol.

Change-Id: Id48d5efe17eeb1a524e280d8885e98cfe1a5577a
Related-Bug: #1843555

healthcheck/common.sh

@@ -47,7 +47,7 @@ healthcheck_port () {
     # port by using "sudo -u" to get the right output.
     # Note: the privileged containers have the correct ss output with root
     # user; which is why we need to run with both users, as a best effort.
-    (ss -ntp; sudo -u $puser ss -ntp) | sort -u | grep -qE ":($ports).*,pid=($pids),"
+    (ss -ntuap; sudo -u $puser ss -ntuap) | sort -u | grep -qE ":($ports).*,pid=($pids),"
 }
 
 healthcheck_listen () {

healthcheck/octavia-health-manager

@@ -5,7 +5,7 @@
 process='octavia-health-manager'
 args="${@:-5555}"
 
-if healthcheck_listen $process $args; then
+if healthcheck_port $process $args; then
     exit 0
 else
     ports=${args// /,}