Because upstream OpenStack requirements master branch
(Victoria) removed any support for Python 2.7 upstream
jobs started failing. We where only using Python 2
because infrared installation process fails on
RHEL/CentOS 7 and Python 3 due to lacking SE Linux
Python bindings.
This workaround this issue by removing support
for Python 2.7 and CentOS/RHEL 7. The support for
CentOS 7 could be restored once the IR issue has
been fixed.
Change-Id: I09d2577a0e5cb4c7efbb6863294f63b2dd88de0a
9cf069dbb0