If the old flags are given as str (or None), call split_flags() to
convert them to a list.
This allows to simplify change_profile_flags() which now doesn't need to
call split_flags() on its own.
Also add some tests with a str for the old flags
(cherry picked from commit e80caa130ad716dcc2d1e75c192fb6ec6ee93935 +
conflict resolution)
... and change change_profile_flags() to use it instead of doing it
itsself
Also add some tests for split_flags()
Cherry-picked from ce7ea062c502da124106ec4bd6db28fef8f3709d + conflict
resolution
Move ProfileStorage() from aa.py to the new profile_storage.py and make
it a class. The variable name in __init__() changes (profile -> self.data),
but the content stays the same.
The ProfileStorage class acts like a dict(), but has some additional
checks for unknown keys in place.
Also add some tests to make sure unknown keys really raise an exception.
Acked-by: Seth Arnold <seth.arnold@canonical.com>
