support non alphanumeric characters for table and column names

Currently columnstore restricts object names to be alphanumeric and underscore, i.e. "A-Z a-z 0-9 _". This precludes use of accented characters for europeans and most non roman languages from using a more natural name.

Created from: https://mariadb.com/kb/en/mariadb/object-name-naming-rule/