Call sudo with -H in pip_install
Commit 7aa7699acb was an incomplete
cherry pick since it missed the part that added -H to sudo pip install.
This is similar to what was added in change
This is needed on stable/icehouse only since the change was made in
Kilo originally and backported to stable/juno. This should fix grenade
against stable/juno changes where the 'old' side is stable/icehouse.