Extend maxconn for galera haproxy

Default "8000" hardcoded in formula and for large deployments
it is not enough. Raising this only for database proxies.

PROD-36509

Change-Id: I979c0a52b6d61dc08accd7d90ab3b1698d40286d
(cherry picked from commit c82e6c00611c10851b8491867bb7fc5d7ffea95c)
diff --git a/haproxy/proxy/listen/openstack/galera/init.yml b/haproxy/proxy/listen/openstack/galera/init.yml
index 1d7285a..67b79b4 100644
--- a/haproxy/proxy/listen/openstack/galera/init.yml
+++ b/haproxy/proxy/listen/openstack/galera/init.yml
@@ -6,6 +6,9 @@
     haproxy_params_check: 'check port 9200'
   haproxy:
     proxy:
+      global:
+        maxconn: 99999
+      maxconn: 99999
       timeout:
         server: 28810s
         client: 28810s
diff --git a/haproxy/proxy/listen/openstack/galera/mysql_neutron_proxy.yml b/haproxy/proxy/listen/openstack/galera/mysql_neutron_proxy.yml
index 6c7b9c2..82b6d50 100644
--- a/haproxy/proxy/listen/openstack/galera/mysql_neutron_proxy.yml
+++ b/haproxy/proxy/listen/openstack/galera/mysql_neutron_proxy.yml
@@ -3,9 +3,6 @@
     haproxy_params_check: 'check port 9200'
   haproxy:
     proxy:
-      timeout:
-        server: 28810s
-        client: 28810s
       listen:
         mysql_cluster_neutron_conn:
           enabled: ${_param:haproxy_neutron_db_proxy_enabled}
diff --git a/haproxy/proxy/listen/openstack/galera/mysql_nova_proxy.yml b/haproxy/proxy/listen/openstack/galera/mysql_nova_proxy.yml
index 8bc138f..7aa7505 100644
--- a/haproxy/proxy/listen/openstack/galera/mysql_nova_proxy.yml
+++ b/haproxy/proxy/listen/openstack/galera/mysql_nova_proxy.yml
@@ -3,9 +3,6 @@
     haproxy_params_check: 'check port 9200'
   haproxy:
     proxy:
-      timeout:
-        server: 28810s
-        client: 28810s
       listen:
         mysql_cluster_nova_conn:
           enabled: ${_param:haproxy_nova_db_proxy_enabled}