targetd plugin:  Add logic for screening exports in plug-in
targetd plugin:  Add logic for screening exports in plug-in

Previous implementation had libStorageMgmt logic embedded in targtd
which was wrong.  Moved the logic into the plug-in so that the
daemon can be used outside of libStorageMgmt.

Signed-off-by: Tony Asleson <1ef2d381aa56d512126ddaacc29e68136e4fdf55@redhat.com>

libstorage/libstoragemgmt,tasleson/libstoragemgmt,tasleson/libstoragemgmt,tasleson/libstoragemgmt,cathay4t/libstoragemgmt,cathay4t/libstoragemgmt,jumitche/libstoragemgmt,jumitche/libstoragemgmt,libstorage/libstoragemgmt,jumitche/libstoragemgmt,libstorage/libstoragemgmt,libstorage/libstoragemgmt,HP-Scale-out-Storage/libstoragemgmt,jumitche/libstoragemgmt,lazy404/libstoragemgmt,jumitche/libstoragemgmt,HP-Scale-out-Storage/libstoragemgmt,lazy404/libstoragemgmt,joehandzik/libstoragemgmt,joehandzik/libstoragemgmt,HP-Scale-out-Storage/libstoragemgmt,libstorage/libstoragemgmt,lazy404/libstoragemgmt,cathay4t/libstoragemgmt,joehandzik/libstoragemgmt,joehandzik/libstoragemgmt,HP-Scale-out-Storage/libstoragemgmt,cathay4t/libstoragemgmt,tasleson/libstoragemgmt,cathay4t/libstoragemgmt,tasleson/libstoragemgmt,lazy404/libstoragemgmt