Revert "WIP: Logial switch ports' labels"

This reverts commit a0b734c09f1214232cb5ac90397f379606bcc5f2.
Add handling set field action for och_sigid

Correct error messages are still missing
Ignore matching on och_sigtype
Add test scenario for optical emulator with 3 logical switches

It work for the config like the below:
Numbers in |X| indicate switch id while numbers in {X} indicate ports.
--- is for an optical link.
~~~||{1} |0| {2}||-----||{3}  |1|  {4}||-----||{5}  |2|  {6}||~~~