<!--- Verify first that your issue is not already reported on GitHub -->
<!--- Also test if the latest release and devel branch are affected too -->
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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)
```

dist_file_dict = {}
        dist_file_content = dist_file_content.strip(DistributionFiles.STRIP_QUOTES)
        if name in self.SEARCH_STRING:
            
            
            if self.SEARCH_STRING[name] in dist_file_content:
                
                dist_file_dict['distribution'] = name
                dist_file_dict['distribution_file_search_string'] = self.SEARCH_STRING[name]
            else:
                
                dist_file_dict['distribution'] = dist_file_content.split()[0]
            return True, dist_file_dict
        if name in self.OS_RELEASE_ALIAS:
            if self.OS_RELEASE_ALIAS[name] in dist_file_content:
                dist_file_dict['distribution'] = name
                return True, dist_file_dict
            return False, dist_file_dict
        
        
        try:
            
            distfunc_name = 'parse_distribution_file_' + name
            distfunc = getattr(self, distfunc_name)
            parsed, dist_file_dict = distfunc(name, dist_file_content, path, collected_facts)