[Orbit-python-list] Fix for __import__()

[Christian R. R. <ki...@as...>]

Tack and Johan,

The attached patch fixes orbit-python to work correctly with __import__(),
fixing the current problem where it simply does not work. I have
significantly reworked auto_load_module_idls and removed a certain part
into a new function, import_from_idl_list to improve legibilty. I have in
the process fixed two memory leaks that could occur with strings. I have
added tests to the suite and ran both tests. The tests don't run at the
moment but that is a product of other bugs which we will someday fix,
hopefully.

It seems to be a decent fix and I'm able to use o-p normally with it
applied. This is my third version of this patch and it incorporates
suggestions from Johan.

Review would be appreciated; this problem is currently blocking my ability
to release my FiscalPrinter software publically.

(clue: if you take too long to review it gets checked in with r=nacho :)

Take care,
--
Christian Reis, Senior Engineer, Async Open Source, Brazil.
http://async.com.br/~kiko/ | [+55 16] 272 3330 | NMFL