remote_logging_server: sleep at the end

It seems ending the test right after we create the mutex can
cause the client not to catch it, sometimes. So let's sleep for
a few seconds after creating it to make sure it does.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

tests/server_remote_logging_server.pm

@@ -32,6 +32,8 @@ sub run {
     assert_script_run 'grep "XXX RSYSLOG TEST MESSAGE" /var/log/messages';
     # tell child test we were successful
     mutex_create("rsyslog_message_received");
+    # give it a few seconds to make sure the client gets it
+    sleep 10;
 }
 
 sub test_flags {