[SYSTEMML-1844] Attach python artifact for install and deploy
[SYSTEMML-1844] Attach python artifact for install and deploy

Attach the python artifact to project using build-helper-maven-plugin's
attach-artifact goal. This allows the python artifact to be installed
into the local maven repository and deployed to the snapshot repository
using the distribution profile.

CLoses #619.

deroneriksson/systemml,deroneriksson/incubator-systemml,apache/incubator-systemml,niketanpansare/systemml,niketanpansare/incubator-systemml,dusenberrymw/incubator-systemml,gweidner/incubator-systemml,dusenberrymw/incubator-systemml,asurve/arvind-sysml2,dusenberrymw/systemml,asurve/incubator-systemml,dusenberrymw/incubator-systemml,apache/incubator-systemml,dusenberrymw/systemml,asurve/incubator-systemml,deroneriksson/incubator-systemml,apache/incubator-systemml,asurve/systemml,niketanpansare/systemml,asurve/arvind-sysml2,asurve/incubator-systemml,deroneriksson/systemml,gweidner/incubator-systemml,asurve/arvind-sysml2,niketanpansare/systemml,dhutchis/systemml,deroneriksson/systemml,asurve/incubator-systemml,niketanpansare/incubator-systemml,gweidner/incubator-systemml,niketanpansare/incubator-systemml,deroneriksson/systemml,apache/incubator-systemml,deroneriksson/incubator-systemml,nakul02/systemml,dusenberrymw/systemml,gweidner/systemml,nakul02/incubator-systemml,dhutchis/systemml,deroneriksson/incubator-systemml,apache/incubator-systemml,gweidner/systemml,gweidner/incubator-systemml,deroneriksson/incubator-systemml,asurve/systemml,dusenberrymw/incubator-systemml,nakul02/systemml,gweidner/systemml,dhutchis/systemml,gweidner/systemml,gweidner/systemml,nakul02/incubator-systemml,asurve/systemml,dusenberrymw/incubator-systemml,asurve/incubator-systemml,asurve/arvind-sysml2,asurve/incubator-systemml,nakul02/incubator-systemml,asurve/systemml,nakul02/systemml,niketanpansare/systemml,gweidner/incubator-systemml,dusenberrymw/systemml,nakul02/systemml,deroneriksson/systemml,niketanpansare/systemml,dhutchis/systemml,dusenberrymw/incubator-systemml,apache/incubator-systemml,nakul02/incubator-systemml,dhutchis/systemml,dusenberrymw/systemml,deroneriksson/systemml,asurve/arvind-sysml2,dusenberrymw/systemml,nakul02/incubator-systemml,nakul02/systemml,niketanpansare/systemml,asurve/systemml,gweidner/systemml,asurve/systemml,nakul02/incubator-systemml,deroneriksson/incubator-systemml,asurve/arvind-sysml2,gweidner/incubator-systemml,nakul02/systemml,niketanpansare/incubator-systemml,dhutchis/systemml