RFR: JDK-8218754: JDK-8068225 regression in JDIBreakpointTest

[gary.adams at oracle.com]

The recent change to JDK-8068225 changed the order of operations
in Debugee.endDebugee() to wait for the debugee to exit before
disposing of the vm on the debugger side of the connection.
For the tests based on JDIBreakpointTest the debuggee exit
status is not used and the tests relied on the
debugger side dispose operation to end the test.

Since JDIBreakpointTest already includes a call to wait for
the debugee, if does not need to use endDebuggee()
to dispose and wait for the debugee to finish.

Testing in progress. The vm/mlvm tests are included in tiers 2, 3 and 6.

diff --git 
a/test/hotspot/jtreg/vmTestbase/vm/mlvm/share/jdi/JDIBreakpointTest.java 
b/test/hotspot/jtreg/vmTestbase/vm/mlvm/share/jdi/JDIBreakpointTest.java
--- a/test/hotspot/jtreg/vmTestbase/vm/mlvm/share/jdi/JDIBreakpointTest.java
+++ b/test/hotspot/jtreg/vmTestbase/vm/mlvm/share/jdi/JDIBreakpointTest.java
@@ -1,5 +1,5 @@
  /*
- * Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights 
reserved.
+ * Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights 
reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
@@ -359,7 +359,7 @@
          }.go();

          if (!debuggee.terminated())
-            debuggee.endDebugee();
+            debuggee.dispose();

          debuggee.waitFor();
          return true;