build-unit-test-docker: Lift openbmc org constraint for HEAD_PKGS
build-unit-test-docker: Lift openbmc org constraint for HEAD_PKGS

Remove the hardcoded openbmc organisation so we can build repos from any
organisation.

Change-Id: I214928c3a70584bfe29baae47b72f0d2795df3ad
Signed-off-by: Andrew Jeffery <02e0a999c50b1f88df7a8f5a04e1b76b35ea6a88@aj.id.au>

openbmc/openbmc-build-scripts,openbmc/openbmc-build-scripts