[BUG] get_dependencies stops on first uninstallable module within a given addons folder

[blaggacao]

Just have a look: (take into account, that "uninstallable" means 'installable != True` in the manifest)

        for path in addons_path.split(','):
            manif_path = is_installable_module(   # This returns false if not installable
                os.path.join(path, addons_list[0]))
            if not manif_path:   # This breakes the recursion if not installable
                continue
            manif = eval(open(manif_path).read())
            return list(
                set(manif.get('depends', [])) |
                set(get_test_dependencies(addons_path, addons_list[1:])) -  # here the next addon is neglected because recursion has been broken
                set(addons_list))

[nhomar]

In the change of the architechture of the package this issue will be taken into account.

#500