Bridge filtering database update

Added changes for handling #default-learning-constraint. Default learning constraint will indicate the default #mac-learning properties of all #VLAN s in the component. This will indicate if they are in #shared / #individual #learning mode. Also indicates the #filtering-database used if in shared mode.

Ethernet update 25 ...
[commit ad70c77a98c67271b057712ccf4488380a91b9b6]