Fixes #4316: Move r30882 to v1.7 branch (Remove the vendor_ids parsing.)

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r30882 [[BR]]
Remove the vendor_ids parsing.
    
We don't use this functionality any more; we use the transport_type
and device name to identify usnic devices.  It's slightly easier
because we can transport_type+name from ibv_device_open() and don't
have to do an additional ibv_query_device() to get its attributes.

Reviewed by Dave Goodell.

cmr=v1.7.5:reviewer=ompi-rm1.7