Merge "Use upper constraints for virtualenv in openstack-base" into stable/ussuri

Author: Zuul

docker/openstack-base/Dockerfile.j2

@@ -309,7 +309,7 @@ ENV DEBIAN_FRONTEND noninteractive
 ADD openstack-base-archive /openstack-base-source
 RUN ln -s openstack-base-source/* /requirements \
     && mkdir -p /var/lib/kolla \
-    && {{ macros.install_pip(['virtualenv'], constraints = false)}} \
+    && {{ macros.install_pip(['virtualenv'])}} \
     && virtualenv --system-site-packages /var/lib/kolla/venv
 
 ENV PATH /var/lib/kolla/venv/bin:$PATH