##### 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.
return self.aggregate_systems(self.get_boot_order)
    def get_boot_override(self, systems_uri):
        result = {}
        properties = ["BootSourceOverrideEnabled", "BootSourceOverrideTarget",
                      "BootSourceOverrideMode", "UefiTargetBootSourceOverride", "BootSourceOverrideTarget@Redfish.AllowableValues"]
        response = self.get_request(self.root_uri + systems_uri)
        if response['ret'] is False:
            return response
        result['ret'] = True
        data = response['data']
        if 'Boot' not in data:
            return {'ret': False, 'msg': "Key Boot not found"}
        boot = data['Boot']
        boot_overrides = {}
        if "BootSourceOverrideEnabled" in boot:
            if boot["BootSourceOverrideEnabled"] is not False:
                for property in properties:
                    if property in boot:
                        if boot[property] is not None:
                            boot_overrides[property] = boot[property]
        else:
            return {'ret': False, 'msg': "No boot override is enabled."}
        result['entries'] = boot_overrides
        return result
    def get_multi_boot_override(self):