[oracle][skip ci] update sample configuration to clarify DSN connection
[oracle][skip ci] update sample configuration to clarify DSN connection

DataDog/integrations-core,DataDog/integrations-core,serverdensity/sd-agent-core-plugins,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,serverdensity/sd-agent-core-plugins,DataDog/integrations-core,DataDog/integrations-core,serverdensity/sd-agent-core-plugins,serverdensity/sd-agent-core-plugins,DataDog/integrations-core,DataDog/integrations-core,serverdensity/sd-agent-core-plugins,DataDog/integrations-core