fix regression of cmdline.py
fix regression of cmdline.py

 * Fix regression: remove default value of member_id, member_count and
   member_type which make other command failed as extra option found.
   Example:
   ====
   lsmcli --create-access-group=gris_test --id=0000000000000099 --type=WWPN
   --system "CLARiiON+APM00114104374"
   lsmcli: error: expected options = (id,type,system) actual =
   (id,member_ids,system,type)
   ====

Signed-off-by: Gris Ge <e24f3acbe39bf94f92e8af3c48f8852106ad5ad7@redhat.com>

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