Revert "Enable VLAN settings for floating network"

This reverts commit 6fafa1c54449d6eced78f4a58d154fec4cb930dd.
Do not allow changes to public network
Revert "Do not show public network"

This reverts commit df8573338297330da5b7d994ccea821b9115a804.
Do not assign public network to default interface
By default vlan_start is not set in db
For public network show cidr, gateway and vlan
Public network is unmovable
Merge branch 'ibm' of github.com:loles/fuelweb into ibm