<!--- Verify first that your issue is not already reported on GitHub -->
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##### SUMMARY
<!--- Explain the problem briefly below -->

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
Setup module and facts about de Operating System is detecting ansible_os_family as "Pop!_OS".
This distribution is based on Ubuntu, so it should be "Debian" the desired result

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```
ansible 2.9.6
  config file = /etc/ansible/ansible.cfg
  configured module search path = ['/home/moucho/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python3/dist-packages/ansible
  executable location = /usr/bin/ansible
  python version = 3.8.2 (default, Apr 27 2020, 15:53:34) [GCC 9.3.0]
```

##### CONFIGURATION
<!--- Paste verbatim output from "ansible-config dump --only-changed" between quotes -->
```
default configuration
```

##### OS / ENVIRONMENT
<!--- Provide all relevant information below, e.g. target OS versions, network device firmware, etc. -->
Pop!_OS 20.04 LTS

##### STEPS TO REPRODUCE
<!--- Describe exactly how to reproduce the problem, using a minimal test-case -->
ansible localhost -m setup

<!--- Paste example playbooks or commands between quotes below -->
<!--- HINT: You can paste gist.github.com links for larger files -->

##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->
ansible_os_family: "Debian"

##### ACTUAL RESULTS
<!--- Describe what actually happened. If possible run with extra verbosity (-vvvv) -->
ansible_os_family: "Pop!_OS"
<!--- Paste verbatim command output between quotes -->

'''has-a various distro file parsers (os-release, etc) and logic for finding the right one.'''
    
    
    
    
    
    OSDIST_LIST = (
        {'path': '/etc/altlinux-release', 'name': 'Altlinux'},
        {'path': '/etc/oracle-release', 'name': 'OracleLinux'},
        {'path': '/etc/slackware-version', 'name': 'Slackware'},
        {'path': '/etc/redhat-release', 'name': 'RedHat'},
        {'path': '/etc/vmware-release', 'name': 'VMwareESX', 'allowempty': True},
        {'path': '/etc/openwrt_release', 'name': 'OpenWrt'},
        {'path': '/etc/system-release', 'name': 'Amazon'},
        {'path': '/etc/alpine-release', 'name': 'Alpine'},
        {'path': '/etc/arch-release', 'name': 'Archlinux', 'allowempty': True},
        {'path': '/etc/os-release', 'name': 'Archlinux'},
        {'path': '/etc/os-release', 'name': 'SUSE'},
        {'path': '/etc/SuSE-release', 'name': 'SUSE'},
        {'path': '/etc/gentoo-release', 'name': 'Gentoo'},
        {'path': '/etc/os-release', 'name': 'Debian'},
        {'path': '/etc/lsb-release', 'name': 'Debian'},