FSA Add WindowsAclFileAttributeViewsTest (Part 3)

This final CL adds tests for the getShareAcl() method.  I was forced
    to make WindowsAclFileAttributeViews.Mpr class public or jna.Native
    complained when I tried to create an instance of it.
    This CL also required adding another stub JNA implemenation of Netapi32.
    
    This brings coverage for WindowsAclFileAttributeViews up to
    96% line coverage and 89% branch coverage.  It brings overall
    coverage for the adaptor to 84% line coverage and 80% branch
    coverage.

[pjo, 2014-04-03 22:24:31]

Thank you.  LGTM.

Miguel, any thoughts?

Yey >80% branch!

[Brett, 2014-04-04 01:27:04]

Committed 03 April 2014 to File System Adaptor:
To https://code.google.com/p/plexi.fs/
   9d6c118..22b6a21  master -> master