Drop the service name from ODU connection name

- With service name appended to the network and client
  side interfaces, the ODU connection names are longer
- Though there is not restriction in the string length
  from OpenROADM MSA, it is better to keep total bytes
  256.

JIRA: TRNSPRTPCE-628

Signed-off-by: Balagangadhar Bathula <bb4341@att.com>
Change-Id: I6149a9c8db18e1de9b939db64f5c12a964a98be0