Fix kwargs for NECDBException.
Fix kwargs for NECDBException.

Updates the NEC plugin to use the correct kwargs when raising
NECDBException.

Fixes LP Bug #1159925.

Change-Id: I1e96d4ec65c1bc98d90d2eb9867fe39bbd505cdc

gkotton/vmware-nsx,gkotton/vmware-nsx