Checkmk Werk 15170: DCD: fix REST API authentication problems

ID: 15170 Title: DCD: fix REST API authentication problems Component: Dynamic host configuration Level: 1 Class: Bug fix Version: 2.2.0i1 Prior to this werk, the DCD raised a REST API authentication error when the user's automation password was changed after it was started. In addition, the same error was also raised when the "Individual automation user credentials" option in the "Connection to the REST API" global setting was configured. This werk fixes both error sources.