Currently, builds are busted because they can't build wheels for these. Change-Id: I964d5858bfb926890169d46cbc7ab4e76fc40250
This patch contains only a new Dockerfile and few changes to be able to build both py2 and py3 images. Next patch should contain changes to add the gate jobs to build a py3 docker image Change-Id: Ifdebde9597a787abcd553756e22261e2faaeedfc