PI-248: Log a warning when we're deleting security groups that exist
PI-248: Log a warning when we're deleting security groups that exist

stackdio/stackdio,stackdio/stackdio,clarkperkins/stackdio,stackdio/stackdio,clarkperkins/stackdio,stackdio/stackdio,clarkperkins/stackdio,clarkperkins/stackdio