Restore changes in vendor directory (#2594)

Part of the changes in 2591 modifies the vendor directory
which should not be modified. `dep ensure` will change it back.

This fix reverts the change of
```
vendor/github.com/apache/thrift/lib/go/thrift/simple_json_protocol.go
```

in 2591.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

vendor/github.com/apache/thrift/lib/go/thrift/simple_json_protocol.go

@@ -334,7 +334,7 @@ func (p *TSimpleJSONProtocol) ReadFieldBegin() (string, TType, int16, error) {
 			p.reader.ReadByte()
 			name, err := p.ParseStringBody()
 			// simplejson is not meant to be read back into thrift
-			// - see https://wiki.apache.org/thrift/ThriftUsageJava
+			// - see http://wiki.apache.org/thrift/ThriftUsageJava
 			// - use JSON instead
 			if err != nil {
 				return name, STOP, 0, err