<!--- 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 -->

result = {}
        response = self.get_request(self.root_uri + self.update_uri)
        if response['ret'] is False:
            return response
        result['ret'] = True
        result['entries'] = {}
        data = response['data']
        if "Actions" in data:
            actions = data['Actions']
            if len(actions) > 0:
                for key in actions.keys():
                    action = actions.get(key)
                    if 'title' in action:
                        title = action['title']
                    else:
                        title = key
                    result['entries'][title] = action.get('TransferProtocol@Redfish.AllowableValues',
                                                          ["Key TransferProtocol@Redfish.AllowableValues not found"])
            else:
                return {'ret': "False", 'msg': "Actions list is empty."}
        else:
            return {'ret': "False", 'msg': "Key Actions not found."}
        return result
    def _software_inventory(self, uri):