R9483 causes NX-OS to have incorrect statusses

The following commit causes "local/remote redundancy peer status" statusses for nx-os devices, which it does not have, so the status returns "unknown" (and triggers an alert)

r9483 | adama | 2018-10-18 19:02:13 +0200 (Thu, 18 Oct 2018) | 2 lines

[ADD] Add CISCO-RF-MIB to Cisco WLC