Check_MK Werk 5445: apc_symmetra_output: Fixed exception 'could not convert string to float' during discovery

ID: 5445 Title: apc_symmetra_output: Fixed exception 'could not convert string to float' during discovery Component: Checks & agents Level: 1 Class: Bug fix Version: 1.5.0i1 Some devices do not provide all values for 'voltage', 'current' or 'output load' and might be empty strings. This caused above exception during discovery. Fixed that.