Add ability to set LOWER_CASE_TABLE_NAMES option before initializing data directory

Hi.

In percona-server there is no way to set the LOWER_CASE_TABLE_NAMES before installing package.

We need to merge https://github.com/mysql/mysql-server/commit/dcf454414460d7c767ca9f4e31d4a4162361a5f2 to percona-server