support trim packet size

Author: ericsson-peiwuyang

src/main/java/com/cisco/trex/stateless/model/vm/TrimPktSize.java

@@ -0,0 +1,21 @@
+package com.cisco.trex.stateless.model.vm;
+
+public class TrimPktSize extends VMInstruction {
+
+  private String type;
+  private String name;
+
+  public TrimPktSize(String name) {
+    super();
+    this.type = "trim_pkt_size";
+    this.name = name;
+  }
+
+  public String getType() {
+    return type;
+  }
+
+  public String getName() {
+    return name;
+  }
+}