Bridged option new behaviour:
1) Change description of "Bridged" option to refer to Linux bridges and OVS bridges (no more direct connections)
2) When "Bridged" is selected, "Destination" will show all the interfaces it currently shows plus OVS bridges
3) "Enable VLAN" will only be showed if user selects a NIC or bonding from "Destination" pop-up (alternatively, we can show it always and block the usage of VLAN with NIC or bonding selected)
4) "Bridged" option will call network_create API with "bridge" as value for "connection" parameter

New macvtap option:
5) Add a new option "macvtap" to Network Type, with same current description of today's Bridged option
6) When macvtap option is selected, "Destination" will show only NICs and bondings. It will NOT show any kind of bridges anymore.
7) "Enable VLAN" option is NOT showed
8) macvtap option will call network create API with "macvtap" as "connection" parameter value.

I will send a V2 patch with the others corrections (function name and alert messages). If V1 patch is not according with the above specifications, please, let me know, then I can fix it.

Thanks

Peter