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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)
```

darwin_facts = {}
        darwin_facts['distribution'] = 'MacOSX'
        rc, out, err = self.module.run_command("/usr/bin/sw_vers -productVersion")
        data = out.split()[-1]
        if data:
            darwin_facts['distribution_major_version'] = data.split('.')[0]
            darwin_facts['distribution_version'] = data
        return darwin_facts
    def get_distribution_FreeBSD(self):
        freebsd_facts = {}
        freebsd_facts['distribution_release'] = platform.release()
        data = re.search(r'(\d+)\.(\d+)-(RELEASE|STABLE|CURRENT).*', freebsd_facts['distribution_release'])
        if 'trueos' in platform.version():
            freebsd_facts['distribution'] = 'TrueOS'
        if data:
            freebsd_facts['distribution_major_version'] = data.group(1)
            freebsd_facts['distribution_version'] = '%s.%s' % (data.group(1), data.group(2))
        return freebsd_facts
    def get_distribution_OpenBSD(self):
        openbsd_facts = {}
        openbsd_facts['distribution_version'] = platform.release()
        rc, out, err = self.module.run_command("/sbin/sysctl -n kern.version")
        match = re.match(r'OpenBSD\s[0-9]+.[0-9]+-(\S+)\s.*', out)
        if match:
            openbsd_facts['distribution_release'] = match.groups()[0]
        else:
            openbsd_facts['distribution_release'] = 'release'
        return openbsd_facts
    def get_distribution_DragonFly(self):