TestUser creates the user and therefore needs the database. Avoid using
it in non-database tests.
Add ApiQueryBlockInfoTraitTest to the Database group because it needs
the database.
Add DeleteUserEmailTest to the Database group because since 3bedffa8
the default user is not created any more in non-database tests
Change-Id: Iff438964dde47a47a2fa4a314d55010bd8c7fee5
Dumping many kinds of object with var_dump() leads to dumping the whole
address space, because a chain of references leads to MediaWikiServices.
So, introduce a trait which replaces the problematic properties with a
placeholder, if their doc comment contains @noVarDump.
Bug: T277618
Change-Id: Ifa685c26fbc5317d0359544289ec3f433ec4fedf