python3: fix container usage
Copy dictionary items into a list to avoid RuntimeError.
Traceback:
Could not execute build: dictionary changed size during iteration
Traceback (most recent call last):
File "/usr/lib/python-exec/python3.4/fedpkg", line 16, in <module>
main()
File "/usr/lib64/python3.4/site-packages/fedpkg/__main__.py", line 78, in main
sys.exit(client.args.command())
File "/usr/lib64/python3.4/site-packages/pyrpkg/cli.py", line 963, in build
return self._watch_koji_tasks(self.cmd.kojisession, [task_id])
File "/usr/lib64/python3.4/site-packages/pyrpkg/cli.py", line 1351, in _watch_koji_tasks
for task_id, task in tasks.items():
RuntimeError: dictionary changed size during iteration
Related: https://pagure.io/rpkg/issue/45
Signed-off-by: Pavel Šimerda <pavlix@pavlix.net>