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##### SUMMARY
<!--- Describe the new feature/improvement briefly below -->
Each VM instance in an Azure VM Scale Set (VMSS) has a computer name (hostname) which is distinct from the instance name. Currently azure_rm_virtualmachinescalesetinstance_facts returns the instance name but not the computer name. It would be extremely helpful if the module can return the computer name as well.

##### ISSUE TYPE
- Feature Idea

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

##### ADDITIONAL INFORMATION
<!--- Describe how the feature would be used, why it is needed and what it would solve -->
We are using this module in [Muchos](https://github.com/apache/fluo-muchos). If azure_rm_virtualmachinescalesetinstance_facts returned the computer name as well, it would help us populate etc/hosts and other related files much more seamlessly.
response = None
        results = []
        try:
            response = self.mgmt_client.virtual_machine_scale_set_vms.get(resource_group_name=self.resource_group,
                                                                          vm_scale_set_name=self.vmss_name,
                                                                          instance_id=self.instance_id)
            self.log("Response : {0}".format(response))
        except CloudError as e:
            self.log('Could not get facts for Virtual Machine Scale Set VM.')
        if response and self.has_tags(response.tags, self.tags):
            results.append(self.format_response(response))
        return results
    def list(self):
        items = None
        try:
            items = self.mgmt_client.virtual_machine_scale_set_vms.list(resource_group_name=self.resource_group,
                                                                        virtual_machine_scale_set_name=self.vmss_name)
            self.log("Response : {0}".format(items))
        except CloudError as e:
            self.log('Could not get facts for Virtual Machine ScaleSet VM.')
        results = []
        for item in items:
            if self.has_tags(item.tags, self.tags):
                results.append(self.format_response(item))
        return results
    def format_response(self, item):