Checkmk Werk 14591: Electrical Power for Devices with only one phase: Remove error message during discovery

ID: 14591 Title: Electrical Power for Devices with only one phase: Remove error message during discovery Component: Checks & agents Level: 1 Class: Bug fix Version: 2.3.0b1 During discovery the following error could occur C+: Invalid check parameter: The datatype must be a tuple, but is dict Variable: checkgroup_parameters:epower_single Parameters: {} C-: This error is cosmetic in nature and does not affect the behaviour of the check. This werk fixes the issue.