Check libmariadb version and warn on buggy version

[t-b]

• [x] Add warning and version in summary

So it could be good to add a check and display an advice or warning if libmariadb2 is detected indeed.

Originally posted by @bourtemb in https://github.com/tango-controls/TangoSourceDistribution/issues/61#issuecomment-574100241

[t-b]

• [x] https://stackoverflow.com/a/55127962