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##### SUMMARY
When ansible-pull creates the ansible command to pull the repo, assuming no additional command line arguments have been supplied, it constructs both an --inventory argument and a --limit argument.  The --inventory argument has only 'localhost,' while the --limit argument has 'localhost,<hostname>,127.0.0.1'.  This is guaranteed to produce the warning:
[WARNING]: Could not match supplied host pattern, ignoring: <hostname>

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
ansible-pull

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
ansible 2.9.7
  config file = /etc/ansible/ansible.cfg
  configured module search path = [u'/home/mwallace/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/dist-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.17 (default, Nov  7 2019, 10:07:09) [GCC 9.2.1 20191008]
```

##### CONFIGURATION
<!--- Paste verbatim output from "ansible-config dump --only-changed" between quotes -->
```paste below
DEPRECATION_WARNINGS(/etc/ansible/ansible.cfg) = False
```

##### OS / ENVIRONMENT
<!--- Provide all relevant information below, e.g. target OS versions, network device firmware, etc. -->
Linux ccm-lc-fin-304 5.3.0-46-generic #38-Ubuntu SMP Fri Mar 27 17:37:05 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

##### STEPS TO REPRODUCE
<!--- Describe exactly how to reproduce the problem, using a minimal test-case -->
sudo ansible-pull -U <git repo url>
<!--- Paste example playbooks or commands between quotes below -->
```yaml

```

<!--- HINT: You can paste gist.github.com links for larger files -->

##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->
I expect this to run with no warnings

##### ACTUAL RESULTS
<!--- Describe what actually happened. If possible run with extra verbosity (-vvvv) -->
I get the warning:
[WARNING]: Could not match supplied host pattern, ignoring: <hostname>

<!--- Paste verbatim command output between quotes -->
```paste below

```

''' use Runner lib to do SSH things '''
        super(PullCLI, self).run()
        
        now = datetime.datetime.now()
        display.display(now.strftime("Starting Ansible Pull at %F %T"))
        display.display(' '.join(sys.argv))
        
        
        node = platform.node()
        host = socket.getfqdn()
        limit_opts = 'localhost,%s,127.0.0.1' % ','.join(set([host, node, host.split('.')[0], node.split('.')[0]]))
        base_opts = '-c local '
        if context.CLIARGS['verbosity'] > 0:
            base_opts += ' -%s' % ''.join(["v" for x in range(0, context.CLIARGS['verbosity'])])
        
        
        inv_opts = self._get_inv_cli()
        if not inv_opts:
            inv_opts = " -i localhost, "
            
            inv_opts += '-e %s ' % shlex.quote('ansible_python_interpreter=%s' % sys.executable)