Currently we perform pip configuration for a list of users, including
pip_conf.yml in a loop for each user. It is slightly more efficient to
loop over each task, since individual tasks have a higher overhead than
loops.
This change refactors the code into multiple loops, with a single
include. We keep the include to allow skipping the tasks when pip
configuration is not required.
Change-Id: I698d38613f45bd03a2e51572f6e6fb69e934f614
Story: 2007993
Task: 40719
43650cb966