<!--- 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 -->

from __future__ import absolute_import, division, print_function
__metaclass__ = type
import json
from ansible.module_utils.urls import open_url
from ansible.module_utils._text import to_text
from ansible.module_utils.six.moves import http_client
from ansible.module_utils.six.moves.urllib.error import URLError, HTTPError
GET_HEADERS = {'accept': 'application/json', 'OData-Version': '4.0'}
POST_HEADERS = {'content-type': 'application/json', 'accept': 'application/json',
                'OData-Version': '4.0'}
PATCH_HEADERS = {'content-type': 'application/json', 'accept': 'application/json',
                 'OData-Version': '4.0'}
DELETE_HEADERS = {'accept': 'application/json', 'OData-Version': '4.0'}
DEPRECATE_MSG = 'Issuing a data modification command without specifying the '\
                'ID of the target %(resource)s resource when there is more '\
                'than one %(resource)s will use the first one in the '\
                'collection. Use the `resource_id` option to specify the '\
                'target %(resource)s ID'
class RedfishUtils(object):