Removing tcp_max_per_addr from default_config hash

Please consider this PR to solve an issue on auditd version 1.7.13 in Ubuntu where tcp_max_per_addr is not a valid option in auditd.conf.
There is no way to remove this key from the default_options using the config_override parameter.
This change seems safe since the default for tcp_max_per_addr is already 1 client connection per the auditd.conf documentation.