Make removeOpcodeByData in line with bitcoind behaviour.

It should remove the opcode and data is the data is contained within the data
pushed, not just if it is equal to it. Found by bitcoind tx tests.

script.go

@@ -754,7 +754,7 @@ func removeOpcode(pkscript []parsedOpcode, opcode byte) []parsedOpcode {
 func removeOpcodeByData(pkscript []parsedOpcode, data []byte) []parsedOpcode {
 	retScript := make([]parsedOpcode, 0, len(pkscript))
 	for _, pop := range pkscript {
-		if !bytes.Equal(pop.data, data) {
+		if !bytes.Contains(pop.data, data) {
 			retScript = append(retScript, pop)
 		}
 	}