A first step to do more automatic code checks on the qa/
directory. This is useful while transitioning to python3.
Also use log_exc to top-level to not run into:
error: Argument 1 to "log_exc" has incompatible type
"Callable[[OSDThrasher], Any]"; expected "OSDThrasher"
Signed-off-by: Thomas Bechtold <tbechtold@suse.com>
