Optional update for python-Cerberus

This update for python-Cerberus fixes the following issues:

- Update to version 1.3.2
* includes various features and improvements - please refer to the changelog for a detailed
technical list of changes
This update was imported from the SUSE:SLE-15-SP1:Update update project.
This update was imported from the openSUSE:Leap:15.1:Update update project.

Fixed bugs
bnc#1121858
python-Cerberus: sync with Factory
bnc#1173465
Build python2 variant of python-Cerberus again
Selected Binaries
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