Ensure /sbin and /usr/sbin is on the PATH to run sudo commands

Test the user env variable PATH to check those directories are listed.
If not, add them to PATH

Bug 1160870

Change-Id: I426f3e224a44d1d37e508fb3e17dd19c5e72dd5d
Install clients first

Install clients first to prevent them from being pulled in from Pypi

Change-Id: Ic6d39dd532ecc3400da510551156d7d036d0b83d