Stop re-invoking pip
Stop re-invoking pip

It turns out we need to just inject into install_requires so that pip's
egg_info processing will do the right thing for dependencies.

Change-Id: Ia6c4725b153b19c3d7e422b1fa62b70cded686e2

WiFast/pbr,varunarya10/pbr,WiFast/pbr,JioCloud/pbr,klmitch/pbr,klmitch/pbr,openstack-dev/pbr,openstack-dev/pbr,openstack-dev/pbr,JioCloud/pbr,varunarya10/pbr