Commit 7aa7699acb764fd73322f8926eb5e967d71e25b0 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
If791b9b25d6a4280dab19117004184e57e78d038.
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.
Change-Id: Ia52823ec2e322f78d407993010eb04adf39a242c
Closes-Bug: #1463149