LPS-46931 Remove references from DBBuilder

Hi @juliocamarero, this PR removes all the `JournalStructure` and `JournalTemplate` references from the portal code. I've tried to identify all the usages but I might have missed something :) Could you please double check?

Also, the last commit, https://github.com/marcellustavares/liferay-portal/commit/0d2dba67d44477ff2784030f330dcd2f7bb85393 is something I'm not entirely sure about it. Let me know what you think.

Thanks a lot!

cc @pablocp