[galera] use same value for galera and haproxy max conn

Use same value for galera and haproxy max connection

The extra connection will be dropped by haproxy instead of galera.

manifests/loadbalancer.pp

@@ -491,6 +491,7 @@ class cloud::loadbalancer(
     ipaddress    => $galera_ip,
     ports        => 3306,
     options      => {
+      'maxconn'        => '1000',
       'mode'           => 'tcp',
       'balance'        => 'roundrobin',
       'option'         => ['tcpka', 'tcplog', 'httpchk'], #httpchk mandatory expect 200 on port 9000

spec/classes/cloud_loadbalancer_spec.rb

@@ -206,6 +206,7 @@ describe 'cloud::loadbalancer' do
         :ipaddress => params[:galera_ip],
         :ports     => '3306',
         :options   => {
+          'maxconn'        => '1000',
           'mode'           => 'tcp',
           'balance'        => 'roundrobin',
           'option'         => ['tcpka','tcplog','httpchk'],