Separating changes for $StaticAccessor/$Accessor into separate patch.

In case matching field is not found, clear (set to null) references to faulty DMH.
Long term, should replace such DMH's with instances that will throw more meaningful
error messages at runtime.

Adding support for extra classes being redefined to the test framework.
Rewriting lambda test a little, extracting classes with lambda's to top
level.

Same fix as for static fields, update offset directly
in the DirectMethodHandle$Accessor.

Do not clear f2 in cp cache entry when entry is not initialized yet.
It might be related to invokehandle/invokedynamic, in which case if
we clear f2 it won't be reinitialized.

SystemDictionary doesn't contain anonymous classes.

Starting using Mercurial MQ for managing DCEVM patches.