This tests the [output] section key 'color-profile', which is meant for
setting up parametric color profiles. It tests the special names, and
fetching values from EDID. There are also tests for all accepted keys in
a [color-profile] section.
These tests are all positive. Error messages are tested in another
patch.
The test client helper changes are needed for loading the EDID file.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>