[Bug] callback_whitelist in ansible.cfg is deprecated, replace with callback_enabled

[keirazhang]

SUMMARY

[DEPRECATION WARNING]: [defaults]callback_whitelist option, normalizing names to new standard, use callback_enabled
instead. This feature will be removed from ansible-core in version 2.15. Deprecation warnings can be disabled by
setting deprecation_warnings=False in ansible.cfg.

ISSUE TYPE

• Bug Report

ANSIBLE VERSION

ansible [core 2.11.0] 
  config file = /home/qiz/workspace/github/ansible-vsphere-gos-validation/ansible.cfg
  configured module search path = ['/home/qiz/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/local/lib/python3.8/dist-packages/ansible
  ansible collection location = /home/qiz/.ansible/collections:/usr/share/ansible/collections
  executable location = /usr/local/bin/ansible
  python version = 3.8.5 (default, May 27 2021, 13:30:53) [GCC 9.3.0]
  jinja version = 2.11.3
  libyaml = True

[Tomorrow9]

Fixed in #80