[vreg] ensure you can register an object from module not known yet. This ease registration of arbitrary objects during testing.

[web] cleanup use of config in web application initialisation

fix unit tests by not using the new create_eid implementation with sqlite Actually, fix a couple of issues with a previous attempt: * do not use double underscores as method patching will fail with these * old method must always be used with sqlite regardless of the no_sqlite_wrap attribute