Security update for python-Django

Open Source Vulnerabilities SUSE-SU-2018:1830-1

This update for python-Django fixes the following security issues: - CVE-2016-2512: The utils.http.is_safe_url function allowed remote attackers to redirect users to arbitrary web sites and conduct phishing attacks or possibly conduct cross-site scripting (XSS) attacks via a URL containing basic authentication (bsc#967999). - CVE-2018-7536: The django.utils.html.urlize() function was extremely slow to evaluate certain inputs due to catastrophic backtracking vulnerabilities (bsc#1083304). - CVE-2018-7537: If django.utils.text.Truncator's chars() and words() methods were passed the html=True argument, they were extremely slow to evaluate certain inputs due to a catastrophic backtracking vulnerability in a regular expression (bsc#1083305).