<!--- 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 -->
This feature would implement a ClearSessions command for the Sessions category of redfish_command, to clear all active sessions.

##### 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_command.py
redfish_utils.py

##### ADDITIONAL INFORMATION
<!--- Describe how the feature would be used, why it is needed and what it would solve -->
This command would help user to clear all active sessions.

<!--- Paste example playbooks or commands between quotes below -->
```yaml

```

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

account_username: "{{ account_username }}"
      roleid: "{{ roleid }}"
  - name: Update user name
    redfish_command:
      category: Accounts
      command: UpdateUserName
      baseuri: "{{ baseuri }}"
      username: "{{ username }}"
      password: "{{ password }}"
      account_username: "{{ account_username }}"
      account_updatename: "{{ account_updatename }}"
  - name: Update user name
    redfish_command:
      category: Accounts
      command: UpdateUserName
      baseuri: "{{ baseuri }}"
      username: "{{ username }}"
      password: "{{ password }}"
      account_username: "{{ account_username }}"
      update_username: "{{ update_username }}"
  - name: Update AccountService properties
    redfish_command:
      category: Accounts
      command: UpdateAccountServiceProperties
      baseuri: "{{ baseuri }}"
      username: "{{ username }}"
      password: "{{ password }}"
      account_properties:
        AccountLockoutThreshold: 5
        AccountLockoutDuration: 600