[MNG-7110] Different behavior of extensions
restore configuration of importRequest
diff --git a/maven-model-builder/src/main/java/org/apache/maven/model/building/DefaultModelBuilder.java b/maven-model-builder/src/main/java/org/apache/maven/model/building/DefaultModelBuilder.java
index afde52a..845480c 100644
--- a/maven-model-builder/src/main/java/org/apache/maven/model/building/DefaultModelBuilder.java
+++ b/maven-model-builder/src/main/java/org/apache/maven/model/building/DefaultModelBuilder.java
@@ -1414,11 +1414,15 @@
             final ModelBuildingResult importResult;
             try
             {
-                ModelBuildingRequest importRequest = new DefaultModelBuildingRequest( request )
-                        .setTwoPhaseBuilding( false )
-                        .setValidationLevel( ModelBuildingRequest.VALIDATION_LEVEL_MINIMAL )
-                        .setModelSource( importSource )
-                        .setModelResolver( modelResolver.newCopy() );
+                ModelBuildingRequest importRequest = new DefaultModelBuildingRequest();
+                importRequest.setValidationLevel( ModelBuildingRequest.VALIDATION_LEVEL_MINIMAL );
+                importRequest.setModelCache( request.getModelCache() );
+                importRequest.setSystemProperties( request.getSystemProperties() );
+                importRequest.setUserProperties( request.getUserProperties() );
+                importRequest.setLocationTracking( request.isLocationTracking() );
+
+                importRequest.setModelSource( importSource );
+                importRequest.setModelResolver( modelResolver.newCopy() );
 
                 importResult = build( importRequest, importIds );
             }