Optimize SegmentParseV2::parse code logic (#2828)

* Optimize code logic

* revert

* fix

oap-server/server-receiver-plugin/skywalking-trace-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/trace/provider/parser/SegmentParseV2.java

@@ -85,7 +85,7 @@ public class SegmentParseV2 {
             if (bufferData.getV2Segment() == null) {
                 bufferData.setV2Segment(parseBinarySegment(upstreamSegment));
             }
-            SegmentObject segmentObject = parseBinarySegment(upstreamSegment);
+            SegmentObject segmentObject = bufferData.getV2Segment();
 
             SegmentDecorator segmentDecorator = new SegmentDecorator(segmentObject);