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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)
```

self.module = module
    def get_distribution_facts(self):
        distribution_facts = {}
        
        
        
        system = platform.system()
        distribution_facts['distribution'] = system
        distribution_facts['distribution_release'] = platform.release()
        distribution_facts['distribution_version'] = platform.version()
        systems_implemented = ('AIX', 'HP-UX', 'Darwin', 'FreeBSD', 'OpenBSD', 'SunOS', 'DragonFly', 'NetBSD')
        if system in systems_implemented:
            cleanedname = system.replace('-', '')
            distfunc = getattr(self, 'get_distribution_' + cleanedname)
            dist_func_facts = distfunc()
            distribution_facts.update(dist_func_facts)
        elif system == 'Linux':
            distribution_files = DistributionFiles(module=self.module)
            
            dist_file_facts = distribution_files.process_dist_files()
            distribution_facts.update(dist_file_facts)
        distro = distribution_facts['distribution']
        
        distribution_facts['os_family'] = self.OS_FAMILY.get(distro, None) or distro
        return distribution_facts
    def get_distribution_AIX(self):