base: install setuptools to fix build on aarch64

Virtualenv used in ussuri has problem installing packages on aarch64:

INFO:kolla.common.utils.openstack-base:    Complete output from command python setup.py egg_info:
INFO:kolla.common.utils.openstack-base:    Traceback (most recent call last):
INFO:kolla.common.utils.openstack-base:      File "<string>", line 1, in <module>
INFO:kolla.common.utils.openstack-base:    ModuleNotFoundError: No module named 'setuptools'

Victoria/Wallaby do not have that issue.

'python3-pip' package in CentOS 8 and Ubuntu 'focal' (victoria+) depend on
'python3-setuptools' package.

Change-Id: I3abda8f972ce854d7fee22b1fb2fc43595668a8d

Author: hrw

docker/base/Dockerfile.j2

@@ -336,6 +336,7 @@ COPY apt_preferences /etc/apt/preferences.d/kolla-custom
    'procps',
    'python3',
    'python3-pip',
+   'python3-setuptools',
    'socat',
    'sudo',
    'tgt']