<!--- Verify first that your feature was not already discussed on GitHub -->
<!--- Complete *all* sections as described, this form is processed automatically -->

##### SUMMARY
<!--- Describe the new feature/improvement briefly below -->
Add new commands to the Redfish remote_management modules to perform firmware update requests.

##### ISSUE TYPE
- Feature Idea

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

##### ADDITIONAL INFORMATION
<!--- Describe how the feature would be used, why it is needed and what it would solve -->
Operators need a way to update firmware on Redfish managed systems. Would like an extension made to be able to perform SimpleUpdate actions with a specified firmware image. At the very minimum we can point to a remote HTTP/TFTP/SCP/etc server, but if possible, it might be good to spin up a lightweight HTTP server to service the request in case one isn't provisioned.

<!--- Paste example playbooks or commands between quotes below -->
```yaml
  - name: Pull style update
    redfish_config:
      category: Update
      command: PullUpdate
      image: http://my.file.repo/someimage.bin
      targets:
        - /redfish/v1/Systems/1
        - /redfish/v1/Systems/2
      baseuri: "{{ baseuri }}"
      username: "{{ username }}"
      password: "{{ password }}"
```

<!--- HINT: You can also paste gist.github.com links for larger files -->

return {'ret': False, 'msg': "Key %s not found" % key}
        bios_uri = data[key]["@odata.id"]
        
        response = self.get_request(self.root_uri + bios_uri)
        if response['ret'] is False:
            return response
        result['ret'] = True
        data = response['data']
        
        attrs_to_patch = dict(attributes)
        
        for attr in attributes:
            if attr not in data[u'Attributes']:
                return {'ret': False, 'msg': "BIOS attribute %s not found" % attr}
            
            if data[u'Attributes'][attr] == attributes[attr]:
                del attrs_to_patch[attr]
        
        if not attrs_to_patch:
            return {'ret': True, 'changed': False,
                    'msg': "BIOS attributes already set"}
        
        set_bios_attr_uri = data["@Redfish.Settings"]["SettingsObject"]["@odata.id"]
        
        payload = {"Attributes": attrs_to_patch}
        response = self.patch_request(self.root_uri + set_bios_attr_uri, payload)
        if response['ret'] is False:
            return response
        return {'ret': True, 'changed': True, 'msg': "Modified BIOS attribute"}
    def set_boot_order(self, boot_list):