<!--- 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 -->

return response
        data = response['data']
        for service_name in payload.keys():
            if service_name not in data:
                return {'ret': False, 'msg': "%s service not supported" % service_name}
            for service_property in payload[service_name].keys():
                if service_property not in data[service_name]:
                    return {'ret': False, 'msg': "%s property for %s service not supported" % (service_property, service_name)}
        
        need_change = False
        for service_name in payload.keys():
            for service_property in payload[service_name].keys():
                value = payload[service_name][service_property]
                if value != data[service_name][service_property]:
                    need_change = True
                    break
        if not need_change:
            return {'ret': True, 'changed': False, 'msg': "Manager NetworkProtocol services already set"}
        response = self.patch_request(self.root_uri + networkprotocol_uri, payload)
        if response['ret'] is False:
            return response
        return {'ret': True, 'changed': True, 'msg': "Modified Manager NetworkProtocol services"}
    @staticmethod
    def to_singular(resource_name):
        if resource_name.endswith('ies'):
            resource_name = resource_name[:-3] + 'y'
        elif resource_name.endswith('s'):
            resource_name = resource_name[:-1]
        return resource_name
    def get_health_resource(self, subsystem, uri, health, expanded):