Massive cleanup to gremlin-python pom.xml
Massive cleanup to gremlin-python pom.xml

Restructured to use virtualenv in all native python calls.

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