Refactor the database setup code to share more code between
ParserTestRunner and MediaWikiIntegrationTestCase. Made
`::setupAllTestDBs` static so it can be reused from
ParserTestRunner.
Made ParserTestRunner::addArticle more like
MediaWikiIntegrationTestCase::addCoreDBData(). Some additional
refactoring work could be done here in the future to share more code.
After the refactoring the ParserTestTables hook is no longer necessary
and so has been (soft) deprecated. MediaWikiIntegrationTestCase
clones all database tables, so ParserTestRunner no longer needs to ask
extensions for a list of specific tables it should clone. Cleaning up
the handful of extensions which define this hook will be left to a
future patch set.
Change-Id: I5124789fac333a664b73b4b4a1e801ecc0a618ca
665eae14ac