ATLAS-3614: added configuration to specify default classification-propagation flag

intg/src/main/java/org/apache/atlas/AtlasConfiguration.java

@@ -56,6 +56,8 @@ public enum AtlasConfiguration {
     RELATIONSHIP_WARN_NO_RELATIONSHIPS("atlas.relationships.warnOnNoRelationships", false),
     ENTITY_CHANGE_NOTIFY_IGNORE_RELATIONSHIP_ATTRIBUTES("atlas.entity.change.notify.ignore.relationship.attributes", true),
 
+    CLASSIFICATION_PROPAGATION_DEFAULT("atlas.classification.propagation.default", true),
+
     //search configuration
     SEARCH_MAX_LIMIT("atlas.search.maxlimit", 10000),
     SEARCH_DEFAULT_LIMIT("atlas.search.defaultlimit", 100),

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

@@ -104,6 +104,10 @@ public class AtlasClassification extends AtlasStruct implements Serializable {
         return propagate;
     }
 
+    public Boolean getPropagate() {
+        return propagate;
+    }
+
     public void setPropagate(Boolean propagate) {
         this.propagate = propagate;
     }

repository/src/main/java/org/apache/atlas/repository/store/graph/v2/EntityGraphMapper.java

@@ -126,6 +126,7 @@ public class EntityGraphMapper {
     private static final int     CUSTOM_ATTRIBUTE_VALUE_MAX_LENGTH = AtlasConfiguration.CUSTOM_ATTRIBUTE_VALUE_MAX_LENGTH.getInt();
 
     private static final boolean ENTITY_CHANGE_NOTIFY_IGNORE_RELATIONSHIP_ATTRIBUTES = AtlasConfiguration.ENTITY_CHANGE_NOTIFY_IGNORE_RELATIONSHIP_ATTRIBUTES.getBoolean();
+    private static final boolean CLASSIFICATION_PROPAGATION_DEFAULT                  = AtlasConfiguration.CLASSIFICATION_PROPAGATION_DEFAULT.getBoolean();
 
     private final GraphHelper               graphHelper = GraphHelper.getInstance();
     private final AtlasGraph                graph;
@@ -1861,10 +1862,11 @@ public class EntityGraphMapper {
 
                     if(reqContext.isImportInProgress() || reqContext.isInNotificationProcessing()) {
                         propagateTags = false;
-                        classification.setPropagate(propagateTags);
                     } else {
-                        propagateTags = true;
+                        propagateTags = CLASSIFICATION_PROPAGATION_DEFAULT;
                     }
+
+                    classification.setPropagate(propagateTags);
                 }
 
                 if (removePropagations == null) {