Bridge filtering database update - 2

Added changes for handling #VLAN-learning-constraint. The learning constraint will indicate the #mac-learning attributes of a #VLAN in the component. All VLANs use the default-learning constraint by default. This will indicate if they are in #shared / #individual #learning mode. Also indicates the #filtering-database used for mac-learning. The VLAN learning constraints are internally mapped to the corresponding filtering databases.

Ethernet update 28 ...
[commit 32e0302f453d2c19c6fab055bba1f837ddbc75cf]