Windows: Reduce complexity of Freelance Callback Logic

Windows: Reduce complexity of Freelance Callback Logic

Over the years the processing of the Freelance callbacks have
added functionality that behaves much more like FetchStatus checks
to a file server.  If the data version of the object has changed,
get the new data.  Given that is the case, we can remove much of
the original refresh logic that is rather race prone.   Say goodbye
to cm_fakeGettingCallback and cm_fakeDirCallback.

LICENSE MIT

Change-Id: I249c84201afc16611039b2ba0801a643fcf05f28
Reviewed-on: http://gerrit.openafs.org/2505
Tested-by: Jeffrey Altman <jaltman@openafs.org>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>