salt config in installation doc and in docker/saltconfig/etc/master file

[jpisard]

Salt 3006.0 and above https://docs.saltproject.io/en/master/topics/netapi/netapi-enable-clients.html

Now we must add netapi_enable_clients to have salt-api work with alcali

netapi_enable_clients:
  - local
  - local_async
  - local_batch
  - local_subset
  - wheel
  - runner
  - runner_async