review request (URGENT): 7054590: (JSR-292) MethodHandleProxies.asInterfaceInstance() accepts private/protected nested interfaces

[John Rose]

(This has been previously reviewed under the bug 7052202.  Here is a separate review for the record.)

http://cr.openjdk.java.net/~jrose/7054590/webrev.00

7054590: (JSR-292) MethodHandleProxies.asInterfaceInstance() accepts private/protected nested interfaces
Summary: fix non-compliant logic in MethodHandleProxies, fix invalid private classes in MethodHandlesTest
Reviewed-by: twisti, never

This has been tested by new unit tests which are not included in this push.  The unit tests may be examined here:
  http://hg.openjdk.java.net/mlvm/mlvm/jdk/file/tip/meth-unittests.patch (near 'asInterfaceInstance')

Negative tests include:
 - non-interfaces Object, String
 - non-public-interface 'PrivateRunnable'
 - Interfaces without a unique method: CharSequence, java.io.Serializable
 - interfaces with a wrong-arity method: Runnable

Positive tests include:
 - typical interface Runnable
 - overloaded interface Appendable
 - unchecked exceptions passed unwrapped
 - checked declared exceptions passed unwrapped
 - checked undeclared exceptions passed wrapped