This patch includes functional tests for image set and it includes
a change to use the OSC utils.format_dict method to format the
properties. This will give a more user friendly format to the image
commands and it gives a more consistent testable format to the
output. Instead of:
{u'a': u'b', u'c': u'd'}
The user will see:
a=b, c=d
Change-Id: Ib396316586ffc5dbab231064d5b6dc9425507934
ce65164155