ZODB Components: Migrate Documents, Extensions and Tests of most bt5s.
Saving/Rebuilding erp5_banking_check failed because bt5 definition was not
updated after removing global actions (83a994b7).

Also, fix erp5_email_reader bt5 definition for actions never committed.
ERP5Vcs: New push reject message has been introduced in at least Git 1.8.4.
ZODB Components: Allow to execute runUnitTest for bt5 Test Components.

Usage: runUnitTest test.VERSION.REFERENCE as exported on the filesystem. Also,
add bt5 Test Components to tests being run through erp5testnode.