Security update for python3

This update for python3 fixes the following issues:

- bsc#1174091, CVE-2019-20907: avoiding possible infinite loop in specifically crafted tarball.

This update was imported from the SUSE:SLE-15:Update update project.

Fixed bugs
bnc#1174091
VUL-1: CVE-2019-20907: python,python36,python3,python27: in Lib/tarfile.py an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation
Selected Binaries
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