8023536: Some regression tests have a wrong header

Reviewed-by: alexsch

test/java/beans/Performance/Test7122740.java

@@ -23,7 +23,7 @@
 
 /*
  * @test
- * @bug 7122740
+ * @bug 7187618 7122740
  * @summary Tests just a benchmark of PropertyDescriptor(String, Class) performance
  * @author Sergey Malenkov
  * @run main/manual Test7122740

test/java/beans/Performance/Test7184799.java

@@ -23,7 +23,7 @@
 
 /*
  * @test
- * @bug 7184799
+ * @bug 7187618 7184799
  * @summary Tests just a benchmark of Introspector.getBeanInfo(Class) performance
  * @author Sergey Malenkov
  * @run main/manual Test7184799

test/javax/swing/JTree/8013571/Test8013571.java

@@ -27,8 +27,8 @@ import javax.swing.tree.DefaultTreeModel;
 
 /*
  * @test
- * @bug 8016545
- * @summary Tests beans with public fields
+ * @bug 8013571
+ * @summary Tests null as a root of TreeModelEvent
  * @author Sergey Malenkov
  */