Checkmk Werk 15759: mk_oracle: Fix error in the mk_oracle plugin

ID: 15759 Title: mk_oracle: Fix error in the mk_oracle plugin Component: agents Level: 1 Class: Bug fix Version: 2.1.0p30 Werk 15848 (version 2.1.0p29) introduced a bug which caused the mk_oracle plugin to execute incorrectly and stop sending data to Checkmk. If called from the command line from the plugin's parent directory, the plugin incorrectly reported `Unhandled location` and terminated, even if the location of the plugin was correct.