More config cleanup for native python build.
More config cleanup for native python build.

Force virtualenv to use python2. Clean up a bit around python "deploy" phase.

newkek/incubator-tinkerpop,artem-aliev/tinkerpop,samiunn/incubator-tinkerpop,jorgebay/tinkerpop,apache/incubator-tinkerpop,newkek/incubator-tinkerpop,pluradj/incubator-tinkerpop,BrynCooke/incubator-tinkerpop,BrynCooke/incubator-tinkerpop,samiunn/incubator-tinkerpop,apache/tinkerpop,apache/incubator-tinkerpop,robertdale/tinkerpop,pluradj/incubator-tinkerpop,artem-aliev/tinkerpop,krlohnes/tinkerpop,artem-aliev/tinkerpop,artem-aliev/tinkerpop,apache/incubator-tinkerpop,robertdale/tinkerpop,apache/tinkerpop,jorgebay/tinkerpop,robertdale/tinkerpop,krlohnes/tinkerpop,krlohnes/tinkerpop,apache/tinkerpop,robertdale/tinkerpop,apache/tinkerpop,apache/tinkerpop,artem-aliev/tinkerpop,pluradj/incubator-tinkerpop,samiunn/incubator-tinkerpop,jorgebay/tinkerpop,apache/tinkerpop,krlohnes/tinkerpop,newkek/incubator-tinkerpop,krlohnes/tinkerpop,jorgebay/tinkerpop,BrynCooke/incubator-tinkerpop,robertdale/tinkerpop,apache/tinkerpop