BUG: Should allow numeric mysql table/column names
Closes #10255 , alternative to #10262 .

Looks good! 
Only, seems it cannot be merged, can you rebase on the latest master? 
Will then merge when travis is green.
 @jorisvandenbossche conflict in whatsnew doc... should be fixed now.
 pls rebase on master and repush had an issue with some builds
 @artemyk Thanks!
