haproxy: Fail when a step in haproxy_run.sh fails

Change-Id: Iab4dbffc796ebf5bdf32b6eda33f3204a70d1392
Signed-off-by: Michal Nasiadka <mnasiadka@gmail.com>

ansible/roles/loadbalancer/templates/haproxy/haproxy_run.sh.j2

@@ -1,4 +1,8 @@
-#!/bin/bash -x
+#!/bin/bash
+
+set -o errexit
+set -o pipefail
+set -o xtrace
 
 {% if kolla_enable_tls_internal | bool or kolla_enable_tls_external | bool %}
 {% if kolla_enable_tls_external | bool %}