Do not run CI using Python 3.7 for ONAP Python SDK

Python 3.7 is end-of-life and was removed from ONAP SDK supported versions

Issue-ID: TEST-412
Signed-off-by: Michal Jagiello <michal.jagiello@t-mobile.pl>
Change-Id: I7aeb9c6b29c8eb499186d401914942c285ffb7ec
1 file changed