Checkmk Werk 15210: mk_oracle: change host and port to required fields in auth choices

ID: 15210 Title: mk_oracle: change host and port to required fields in auth choices Component: Setup Level: 1 Class: Bug fix Version: 2.2.0i1 The Oracle plugin allowed the user to configure Login options without actually configuring any details. This also resulted in the default values for 'Hostname' or 'TCP-Port for Listener' to be ignored. This werk fixes this issue.