Turn IPA scripts to python3 -bb for testing
This is a commit which expands current scripts being run under
python3 by default. We set the -bb option so that any Bytes/Str
error breaks execution.
This commit shall be reverted before reaching production.
Reviewed-By: Tomas Krizek <email@example.com>
Reviewed-By: Christian Heimes <firstname.lastname@example.org>