Install pip using get-pip in launch node

packaged pip vs. upstream pip gets the systems very broken. Make launch-node
use get-pip to install pip as per:

http://www.pip-installer.org/en/latest/installing.html

Change-Id: Ice28b47d766c04b42462a7297911dc1a1abe5a77
Merge "Install pip using get-pip in launch node"