Add sudo to easy_install pip
Add sudo to easy_install pip

If pip installation is required in run_tests.sh it must be
executed with sudo for non-root users.

Change-Id: I0d89a6027d129c9b69811dde4d542f7bc13ca46a

stackforge/packstack,openstack/packstack,stackforge/packstack,openstack/packstack,mahak/packstack,fr34k8/packstack,mahak/packstack,fr34k8/packstack,mahak/packstack,fr34k8/packstack,openstack/packstack,stackforge/packstack