Box is specifically unticked for "Auto deploy when new Image is available" - however when the mariadb imagestream has been updated - the latest image has been deployed regardless.     

4.15    

 always  

created a new mariaDB DC from the openshift template catalogue (pointing at the openshift/mariadb imagestream) 

follow steps in article to covert dc to deployment 
https://developers.redhat.com/learning/learn:openshift:replace-deprecated-deploymentconfigs-deployments/resource/resources:convert-deploymentconfig-deployment 

ensured that box for deploy when new image available is not ticked (and that "paused":"true" in the annotation)

imported/refreshed the mariadb imagestream & the deployment recreated/rolled out 

image is rolled out  

   image should not be rolled out