Cisco: logging incorrectly called with (fmt, arg) tuple

cisco.db.n1kv_db_v2._validate_segment_range_uniqueness() includes these
lines:

   msg = (_("NetworkProfile name %s already exists"),
          net_p["name"])
   LOG.error(msg)
   raise n_exc.InvalidInput(error_message=msg)

As written, msg is a tuple, and the various logging lines below print
the tuple members without properly expanding the format string as
intended.

The format in msg should have been expanded using % - as was presumably
the intention.  This change fixes this and a similar example elsewhere
in this file.

Change-Id: I993245a18ff3db5d5700fb1298ffc958d5827736
Closes-Bug: #1404785
Merge "Cisco: logging incorrectly called with (fmt, arg) tuple"