Currently the warning is only seen in peer logs if couchdb debug is enabled.

Peer should log a warning without having to enable couchdb debug.

Log warning to peer when "no matching index found" warning comes from
couchdb queries.

Change-Id: I46a5fa663c502bbdf74261a4925ce54633384d1f
Signed-off-by: Chris Elder <chris.elder@us.ibm.com>