cmdline.py: Alternative way to handle aliases
cmdline.py: Alternative way to handle aliases

This simplifies things and allows the argparse library to work as
expected.  However, the help text is different as the aliases are
now in their own section.

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

jumitche/libstoragemgmt,joehandzik/libstoragemgmt,libstorage/libstoragemgmt,cathay4t/libstoragemgmt,joehandzik/libstoragemgmt,tasleson/libstoragemgmt,jumitche/libstoragemgmt,libstorage/libstoragemgmt,joehandzik/libstoragemgmt,jumitche/libstoragemgmt,tasleson/libstoragemgmt,cathay4t/libstoragemgmt,cathay4t/libstoragemgmt,libstorage/libstoragemgmt,libstorage/libstoragemgmt,cathay4t/libstoragemgmt,cathay4t/libstoragemgmt,tasleson/libstoragemgmt,jumitche/libstoragemgmt,jumitche/libstoragemgmt,tasleson/libstoragemgmt,joehandzik/libstoragemgmt,tasleson/libstoragemgmt,libstorage/libstoragemgmt