Checkmk Werk 10045: Fix possible "variable referenced before assignment" during bulk discovery

ID: 10045 Title: Fix possible "variable referenced before assignment" during bulk discovery Component: Core & setup Level: 1 Class: Bug fix Version: 1.7.0i1 When an error occurs while communicating with a monitored system, the bulk discovery could fail with an error like "variable referenced before assignment" while handling the error situation.