Windows: AFSInitPIOCtlDirectoryCB fixes

Rename ObjectInfo parameter to ParentObjectInfo since
it does represent the parent of the PIOCtlDirectoryCB
that is being allocated.

If the AFS_DIR_ENTRY_TAG allocation fails, do not call
AFSDeleteObjectInfo( pObjectInfoCB) prior to the try_return
because AFSDeleteObjectInfo() will be executed in the try_exit
block.

Finally, do not increment the pDirNode->ObjectInformationCB
reference count when returning STATUS_REPARSE.  The reference
count is tracked by the pDirNode pointer and has already been
allocated.

Change-Id: Iac3d2b1b58d3bf12eb08c92b96beca43e794aef5
Reviewed-on: http://gerrit.openafs.org/8963
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>