##### SUMMARY
This feature would implement a SetManagerNic command for the Manager category of redfish_config, to update Manager NIC configuration. 

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
redfish_config

##### ADDITIONAL INFORMATION
This command would help user to configure their Manager NIC.
result = {}
        key = "Boot"
        if not bootdevice:
            return {'ret': False,
                    'msg': "bootdevice option required for SetOneTimeBoot"}
        
        response = self.get_request(self.root_uri + self.systems_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}
        boot = data[key]
        annotation = 'BootSourceOverrideTarget@Redfish.AllowableValues'
        if annotation in boot:
            allowable_values = boot[annotation]
            if isinstance(allowable_values, list) and bootdevice not in allowable_values: