Fix sugar-install-bundle - Python 2
Fix sugar-install-bundle - Python 2

On Python 2 is seen
ConfigParser instance has no attribute 'read_string'

Regression introduced by 2018c930adae85c18b1c51b5f80836fcad6c392c

Fixes https://github.com/sugarlabs/sugar-toolkit-gtk3/issues/438

Signed-off-by: James Cameron <979be511e3d216882811a349af33a6d24f3f5f99@laptop.org>

sugarlabs/sugar-toolkit-gtk3,sugarlabs/sugar-toolkit-gtk3,sugarlabs/sugar-toolkit-gtk3