#### SUMMARY
This feature would implement a UpdateUserName command for the Accounts category of redfish_command, to update user name. And also implement a UpdatePasswordPolicy command for the Accounts category of redfish_command to change password policy.

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
redfish_command

##### ADDITIONAL INFORMATION
These 2 commands would help user to update user name or update password policy

result = {}
        key = 'IndicatorLED'
        payloads = {'IndicatorLedOn': 'Lit', 'IndicatorLedOff': 'Off', "IndicatorLedBlink": 'Blinking'}
        result = {}
        for chassis_uri in self.chassis_uri_list:
            response = self.get_request(self.root_uri + chassis_uri)
            if response['ret'] is False:
                return response
            result['ret'] = True
            data = response['data']
            if key not in data:
                return {'ret': False, 'msg': "Key %s not found" % key}
            if command in payloads.keys():
                payload = {'IndicatorLED': payloads[command]}
                response = self.patch_request(self.root_uri + chassis_uri, payload)
                if response['ret'] is False:
                    return response
            else:
                return {'ret': False, 'msg': 'Invalid command'}
        return result
    def _map_reset_type(self, reset_type, allowable_values):