Remove deprecation warnings as soon as metrics-lib 1.7.0 is released
Current metrics-web master does not use any deprecated metrics-lib methods, but as soon as we release metrics-lib 1.7.0 and update metrics-web to use that there will be some warnings. I found 1 such warning in the advbwdist module and 3 warnings in the legacy module, all related to streamlined digest methods. There might be more when metrics-lib 1.7.0 comes out. This ticket is a placeholder to make sure that we remove these warnings soon after they appear.