ATLAS-2076: update type-search to support filter by RELATIONSHIP type

repository/src/main/java/org/apache/atlas/repository/store/graph/AtlasTypeDefGraphStore.java

@@ -668,6 +668,9 @@ public abstract class AtlasTypeDefGraphStore implements AtlasTypeDefStore {
             case ENTITY:
                 ret = ((AtlasEntityType) type).getEntityDef();
                 break;
+            case RELATIONSHIP:
+                ret = ((AtlasRelationshipType) type).getRelationshipDef();
+                break;
             case PRIMITIVE:
             case OBJECT_ID_TYPE:
             case ARRAY:

repository/src/main/java/org/apache/atlas/repository/util/FilterUtil.java

@@ -115,6 +115,8 @@ public class FilterUtil {
                             return atlasType.getTypeCategory() == TypeCategory.STRUCT;
                         case "ENUM":
                             return atlasType.getTypeCategory() == TypeCategory.ENUM;
+                        case "RELATIONSHIP":
+                            return atlasType.getTypeCategory() == TypeCategory.RELATIONSHIP;
                         default:
                             // This shouldn't have happened
                             return false;