DES-4421 Web TestEngine demo

Layer 2 bridging is disabled by default and interfaces must join a bridge domain (VLAN) before being able to forward frames.

Networking is enabled by default and all switch-specific OS10EE capabilities are available.

Networking is available on MX9116n FSE and MX7116n FEM but not on the MX5108n.

Switches operate as layer 2 I/O aggregation devices and are managed through OME-M.