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##### SUMMARY
hostname module fails on linux pardus distributions.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```
3.8.2
```

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

```

##### OS / ENVIRONMENT
Pardus Gnu/Linux 19.3


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

<!--- Paste example playbooks or commands between quotes below -->
```
 - name: set hostname
    hostname:
      name: "pardus"
```

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

##### EXPECTED RESULTS
should set hostname on pardus as well


##### ACTUAL RESULTS
<!--- Describe what actually happened. If possible run with extra verbosity (-vvvv) -->

<!--- Paste verbatim command output between quotes -->
```
hostname module cannot be used on platform Linux (pardus)
```

aix_facts = {}
        rc, out, err = self.module.run_command("/usr/bin/oslevel")
        data = out.split('.')
        aix_facts['distribution_major_version'] = data[0]
        if len(data) > 1:
            aix_facts['distribution_version'] = '%s.%s' % (data[0], data[1])
            aix_facts['distribution_release'] = data[1]
        else:
            aix_facts['distribution_version'] = data[0]
        return aix_facts
    def get_distribution_HPUX(self):
        hpux_facts = {}
        rc, out, err = self.module.run_command(r"/usr/sbin/swlist |egrep 'HPUX.*OE.*[AB].[0-9]+\.[0-9]+'", use_unsafe_shell=True)
        data = re.search(r'HPUX.*OE.*([AB].[0-9]+\.[0-9]+)\.([0-9]+).*', out)
        if data:
            hpux_facts['distribution_version'] = data.groups()[0]
            hpux_facts['distribution_release'] = data.groups()[1]
        return hpux_facts
    def get_distribution_Darwin(self):