Use apt to install python3-pip, and use pip3 in event system has
both pip2 and pip3 installed. Use apt to install setuptools for
Ansible's consumption.
Change-Id: Icd66c91e1c26627f756373800b3913d8c347e412
Signed-off-by: Alexander Hughes <Alexander.Hughes@pm.me>
Co-Authored-By: Alexey Odinokov <aodinokov@mirantis.com>