Imagebackend should call processutils.execute directly.
Imagebackend should call processutils.execute directly.

What it says on the tin.

Change-Id: I43de49851d435e2eb62f6806507f0e68cd690d2c

klmitch/nova,openstack/nova,rahulunair/nova,openstack/nova,mikalstill/nova,mikalstill/nova,klmitch/nova,klmitch/nova,rahulunair/nova,mahak/nova,mahak/nova,mahak/nova,rahulunair/nova,klmitch/nova,openstack/nova,mikalstill/nova