Network config: handle interface replacement. Refs #2837
DB initialization: change default network configuration. Refs #2872
firewall-adjust: do not use event property. Refs #2873
Merged into master. Refs #2873 #2872

* Handle nethserver-firewall-base uninstallation
* System initialization: change default ip addresses
Merged into master. Refs #2837

Reconfigure networking on NIC replacement