ATLAS-4763: Update copy constructor of AtlasClassification

- Fix the shallow copy issue.

Author: TomDu

Diff for: intg/src/main/java/org/apache/atlas/model/instance/AtlasClassification.java

@@ -81,9 +81,9 @@ public AtlasClassification(Map map) {
     }
 
     public AtlasClassification(AtlasClassification other) {
+        super(other);
+
         if (other != null) {
-            setTypeName(other.getTypeName());
-            setAttributes(other.getAttributes());
             setEntityGuid(other.getEntityGuid());
             setEntityStatus(other.getEntityStatus());
             setPropagate(other.isPropagate());

Diff for: intg/src/main/java/org/apache/atlas/model/instance/AtlasStruct.java

@@ -102,7 +102,9 @@ public AtlasStruct(Map map) {
     public AtlasStruct(AtlasStruct other) {
         if (other != null) {
             setTypeName(other.getTypeName());
-            setAttributes(new HashMap<>(other.getAttributes()));
+            if (other.getAttributes() != null) {
+                setAttributes(new HashMap<>(other.getAttributes()));
+            }
         }
     }