Device renderer for 7.1 muxponder use case

Create the LO OTN interfaces required for the 4x100G muxponder usecase:

Following are the interfaces needed:

1. Network ODU4 (requires trib-port and trib-slots), ODU-CTP
2. 100G Ethernet client
3. CLIENT ODU4 (ODU-TTP-CTP)
4. ODU cross-connect (between Client ODU4 and network ODU4)