Fix for haproxy precheck failing on CentOS running non-root

Change-Id: I7f2b3a6f1eacd4cabcaa31de543b7489bc5e654b
Closes-bug: #1844636
Signed-off-by: Radosław Piliszek <radoslaw.piliszek@gmail.com>

ansible/roles/haproxy/tasks/precheck.yml

@@ -170,6 +170,7 @@
     - api_interface_address != kolla_internal_vip_address
 
 - name: Checking if kolla_internal_vip_address is in the same network as api_interface on all nodes
+  become: true
   command: ip -o addr show dev {{ api_interface }}
   register: ip_addr_output
   changed_when: false