<!--- 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 -->

result = {}
    module = AnsibleModule(
        argument_spec=dict(
            category=dict(required=True),
            command=dict(required=True, type='list'),
            baseuri=dict(required=True),
            username=dict(required=True),
            password=dict(required=True, no_log=True),
            id=dict(aliases=["account_id"]),
            new_username=dict(aliases=["account_username"]),
            new_password=dict(aliases=["account_password"], no_log=True),
            roleid=dict(aliases=["account_roleid"]),
            update_username=dict(type='str', aliases=["account_updatename"]),
            account_properties=dict(type='dict', default={}),
            bootdevice=dict(),
            timeout=dict(type='int', default=10),
            uefi_target=dict(),
            boot_next=dict(),
            resource_id=dict()
        ),
        supports_check_mode=False
    )
    category = module.params['category']
    command_list = module.params['command']