Three chains ack fix (cosmos#419)

* ack fix

* test and update configs

Author: colin-axner

configs/three/paths/demo.json

@@ -1 +1 @@
-{"src":{"chain-id":"ibc-0","client-id":"ibconeclient","connection-id":"ibconeconnection","channel-id":"ibconexfer","port-id":"transfer","order":"unordered","version":"ics20-1"},"dst":{"chain-id":"ibc-1","client-id":"ibczeroclient","connection-id":"ibczeroconnection","channel-id":"ibczeroxfer","port-id":"transfer","order":"unordered","version":"ics20-1"},"strategy":{"type":"naive"}}
+{"src":{"chain-id":"ibc-0","client-id":"","connection-id":"","channel-id":"","port-id":"transfer","order":"unordered","version":"ics20-1"},"dst":{"chain-id":"ibc-1","client-id":"","connection-id":"","channel-id":"","port-id":"transfer","order":"unordered","version":"ics20-1"},"strategy":{"type":"naive"}}

configs/three/paths/demo2.json

@@ -1 +1 @@
-{"src":{"chain-id":"ibc-1","client-id":"ibctwoclient","connection-id":"ibctwoconnection","channel-id":"ibctwoxfer","port-id":"transfer","order":"unordered","version":"ics20-1"},"dst":{"chain-id":"ibc-2","client-id":"ibconeclient","connection-id":"ibconeconnection","channel-id":"ibconexfer","port-id":"transfer","order":"unordered","version":"ics20-1"},"strategy":{"type":"naive"}}
+{"src":{"chain-id":"ibc-1","client-id":"","connection-id":"","channel-id":"","port-id":"transfer","order":"unordered","version":"ics20-1"},"dst":{"chain-id":"ibc-2","client-id":"","connection-id":"","channel-id":"","port-id":"transfer","order":"unordered","version":"ics20-1"},"strategy":{"type":"naive"}}

relayer/naive-strategy.go

@@ -632,7 +632,7 @@ func relayPacketFromSequence(src, dst *Chain, sh *SyncHeaders, seq uint64) (rela
 }
 
 func acknowledgementFromSequence(src, dst *Chain, sh *SyncHeaders, seq uint64) (relayPacket, error) {
-	txs, err := src.QueryTxs(sh.GetHeight(src.ChainID), 1, 1000, ackPacketQuery(dst.PathEnd.ChannelID, int(seq)))
+	txs, err := src.QueryTxs(sh.GetHeight(src.ChainID), 1, 1000, ackPacketQuery(src.PathEnd.ChannelID, int(seq)))
 	switch {
 	case err != nil:
 		return nil, err
@@ -814,6 +814,6 @@ func rcvPacketQuery(channelID string, seq int) []string {
 }
 
 func ackPacketQuery(channelID string, seq int) []string {
-	return []string{fmt.Sprintf("%s.packet_src_channel='%s'", waTag, channelID),
+	return []string{fmt.Sprintf("%s.packet_dst_channel='%s'", waTag, channelID),
 		fmt.Sprintf("%s.packet_sequence='%d'", waTag, seq)}
 }