<!--- Verify first that your issue is not already reported on GitHub -->
<!--- Also test if the latest release and devel branch are affected too -->
<!--- Complete *all* sections as described, this form is processed automatically -->

##### 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)
```

"""
    This is a generic Hostname manipulation class that is subclassed
    based on platform.
    A subclass may wish to set different strategy instance to self.strategy.
    All subclasses MUST define platform and distribution (which may be None).
    """
    platform = 'Generic'
    distribution = None
    strategy_class = UnimplementedStrategy
    def __new__(cls, *args, **kwargs):
        new_cls = get_platform_subclass(Hostname)
        return super(cls, new_cls).__new__(new_cls)
    def __init__(self, module):
        self.module = module
        self.name = module.params['name']
        self.use = module.params['use']
        if self.use is not None:
            strat = globals()['%sStrategy' % STRATS[self.use]]
            self.strategy = strat(module)
        elif self.platform == 'Linux' and ServiceMgrFactCollector.is_systemd_managed(module):
            self.strategy = SystemdStrategy(module)
        else:
            self.strategy = self.strategy_class(module)
    def update_current_and_permanent_hostname(self):
        return self.strategy.update_current_and_permanent_hostname()
    def get_current_hostname(self):
        return self.strategy.get_current_hostname()
    def set_current_hostname(self, name):