FAB-2560 GetQueryResult() query re-write is incorrect

Query is getting re-written in fabric with duplicate "data" wrappers.

Query in chaincode:

{"selector":{"docTypeId":3,"oriRe":"SMP","ctB":"CTB","valDt":"1990-12-24",
"orB":"YYY","tD":"TD","cuVoB":52,"cuIoBu":"AA","cuSt":"NA"}}

Result:

2017-03-01 06:48:14.782 UTC [statecouchdb] ApplyQueryWrapper ->
DEBU 441 Rewritten query with data wrapper: {"selector":{"$and":[
{"chaincodeid":"marbles"},
{"data.cuIoBu":"AA","data.cuVoB":52,"data.data.ctB":"CTB","data.data.cuSt":"NA",
"data.docTypeId":3,"data.orB":"YYY","data.oriRe":"SMP","data.tD":"TD"
"data.valDt":"1990-12-24"}]}}

Multiple fields have the "data" wrapper repeated.

Change-Id: I50445f15222dbdf5bd61e475666c2c34fde6fda4
Signed-off-by: Chris Elder <chris.elder@us.ibm.com>

Author: Chris Elder

core/ledger/kvledger/txmgmt/statedb/statecouchdb/query_wrapper.go

@@ -198,8 +198,14 @@ func processAndWrapQuery(jsonQueryMap map[string]interface{}) {
 //the next level of the json query
 func processInterfaceMap(jsonFragment map[string]interface{}) {
 
-	//iterate the the item in the map
+	//create a copy of the jsonFragment for iterating
+	var bufferFragment = make(map[string]interface{})
 	for keyVal, itemVal := range jsonFragment {
+		bufferFragment[keyVal] = itemVal
+	}
+
+	//iterate the the item in the map
+	for keyVal, itemVal := range bufferFragment {
 
 		//check to see if the key is an operator
 		if arrayContains(validOperators, keyVal) {