move contint packages under a submodule

The huge list of misc::contint::test::packages is now in a 'contint'
submodule. The new class name is contint::packages.  I have left the old
entry around for back compatibility, will get removed after the huge
refactor.

Change-Id: Id938b8e7fef6465b41d74c12d86fd86c385c683b
Merge "move contint packages under a submodule" into production