Try harder to restart ldap, if it's failing

In case it won't restart, restart all zimbra services, prevents mailboxd going crasy and filling GB of logs about not being able to contact LDAP

zmbh/zmbh.pl

@@ -101,7 +101,24 @@ if ( $opt->{pre} ) {
       log_info("No service were shutted down");
     } elsif ($opt->{shutdown} eq 'ldap' and -e '/opt/zimbra/bin/ldap'){
       log_info("Starting Zimbra LDAP service");
-      system("/opt/zimbra/bin/ldap start");
+      my $try = 0;
+      my $running = 0;
+      while ($try < 20) {
+        system("/opt/zimbra/bin/ldap start");
+        sleep 1;
+        if (system("/opt/zimbra/bin/ldap status") == 0){
+          $running = 1;
+          last;
+        } else {
+          log_info('ldap service not running, trying again to start it');
+          $try++;
+        }
+      }
+      # Couldn't start ldap ? Restart all the services
+      if (not $running){
+        log_info("Failed to restart ldap, restarting all Zimbra services");
+        system('systemctl restart zimbra');
+      }
     } else {
       log_info("Starting Zimbra services");
       system('systemctl start zimbra');