<!--- 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 -->

key = "Actions"
        reset_type_values = ['On', 'ForceOff', 'GracefulShutdown',
                             'GracefulRestart', 'ForceRestart', 'Nmi',
                             'ForceOn', 'PushPowerButton', 'PowerCycle']
        
        if not command.startswith('Power'):
            return {'ret': False, 'msg': 'Invalid Command (%s)' % command}
        reset_type = command[5:]
        
        if reset_type == 'Reboot':
            reset_type = 'GracefulRestart'
        if reset_type not in reset_type_values:
            return {'ret': False, 'msg': 'Invalid Command (%s)' % command}
        
        response = self.get_request(self.root_uri + self.systems_uri)
        if response['ret'] is False:
            return response
        data = response['data']
        power_state = data.get('PowerState')
        
        if power_state == "On" and reset_type in ['On', 'ForceOn']:
            return {'ret': True, 'changed': False}
        if power_state == "Off" and reset_type in ['GracefulShutdown', 'ForceOff']:
            return {'ret': True, 'changed': False}
        
        if key not in data or '#ComputerSystem.Reset' not in data[key]:
            return {'ret': False, 'msg': 'Action #ComputerSystem.Reset not found'}
        reset_action = data[key]['#ComputerSystem.Reset']
        if 'target' not in reset_action: