[LU-13736] Do not set preferred NI for MR peer

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.14.0
• Severity: 3
• Assignee: Chris Horn
• Reporter: Chris Horn

Description

The preferred NI exists to ensure that a consistent source address is
used when communicating with a non-multi-rail peer. We needn't ever
set a preferred NI for a MR peer.