Description of problem:
When trying to activate a volume group without autobackup enabled, it fails because "-A option not necessary with -a option".

Version-Release number of selected component (if applicable):
vgchange --version
  LVM version:     2.02.180(2) (2018-07-19)
  Library version: 1.02.149 (2018-07-19)
  Driver version:  4.39.0

How reproducible:
Every time

Steps to Reproduce:
1. vgchange -A n -a y my_vg

Actual results:

root@(none):~# vgchange -A n -a y my_vg
  -A option not necessary with -a option
  Run `vgchange --help' for more information.

Expected results:
Command succeeds

Additional info: