Fix typo and version for installing docker and kubespray

[JH-LEE-KR]

1. I am facing below error in kubespray part during installation.

   fatal: [node1]: FAILED! =>
   msg: I-
   The task includes an option with an undefined variable. The error was. "dns domain! is undefined, "dns domain! is undefined
   
   The error appears to be in '/home/jaeho/deepops/submodules/kubespray/roles/kubernetes/preinstall/tasks/0020-set_facts.yml': line 59, column 3, but may be elsewhere in the file depending on the exact syntax problem.
   
   The offending line appears to be:
   - name: Set default dns if remove_default_searchdomains is false
   ^ here
   

   After checking, I found that there was an extension typo in loading the variable file for 'dns_domain' of submodule kubespray.
   https://github.com/NVIDIA/deepops/blob/master/playbooks/container/docker.yml#L10
   Modified from main.yaml to main.yml.

2. Updated the required version of community.docker to 3.10.2 following commit.
   Revert "Update ansible.cfg" #1327 (comment)