HHH-14270 GroupedSchemaValidatorImpl / NameSpaceTablesInformation does not find different-case table information in case insensitive environment

[mehmetali2003]

In a case-insensitive database, the names in the entity mapping and the database schema should only be compared after converting them to the same case, either upper- or lowercase. For that, getTableInformation needs to be rewritten to find the name with either upper or lowercase in the map of tables.

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license
and can be relicensed under the terms of the LGPL v2.1 license in the future at the maintainers' discretion.
For more information on licensing, please check here.

---

https://hibernate.atlassian.net/browse/HHH-14270

[mbellade]

Hello @mehmetali2003, thank you for the contribution, I left a comment on a possibly better approach. I would also ask you to include a test within your PR that asserts that the behavior explained in the linked Jira issue doesn't occur and protects against regressions in the future.