[Timeline] Fix reordering

Fix reordering behavior when dragging-and-dropping within timelines;
addresses #789.

platform/features/timeline/test/controllers/swimlane/TimelineSwimlaneDropHandlerSpec.js

@@ -206,6 +206,7 @@ define(
 
             it("allows reordering within a parent", function () {
                 var testModel = { composition: [ 'x', 'b', 'y', 'd' ] };
+
                 mockSwimlane.highlightBottom.andReturn(true);
                 mockSwimlane.expanded = true;
                 mockSwimlane.children = [];
@@ -225,6 +226,16 @@ define(
                 });
             });
 
+            it("does not invoke an action when reordering", function () {
+                mockSwimlane.highlightBottom.andReturn(true);
+                mockSwimlane.expanded = true;
+                mockSwimlane.children = [];
+                mockContext.getParent
+                    .andReturn(mockSwimlane.parent.domainObject);
+                handler.drop('d', mockOtherObject);
+                expect(mockAction.perform).not.toHaveBeenCalled();
+            });
+
         });
     }
 );