Set galera haproxy timeouts to 28810 seconds

Related-Prod: PROD-36221
Change-Id: I7db30378854fcf750d9ae156145db9cbba78c619
diff --git a/haproxy/proxy/listen/openstack/galera/init.yml b/haproxy/proxy/listen/openstack/galera/init.yml
index 9f210d4..de937bc 100644
--- a/haproxy/proxy/listen/openstack/galera/init.yml
+++ b/haproxy/proxy/listen/openstack/galera/init.yml
@@ -3,6 +3,9 @@
     haproxy_params_check: 'check port 9200'
   haproxy:
     proxy:
+      timeout:
+        server: 28810s
+        client: 28810s
       listen:
         mysql_cluster:
           type: mysql