ci: Set runc as default runtime for image creation
ci: Set runc as default runtime for image creation

jenkins may use cc-runtime as default runtime.
This is an issue when an image need to be created with osbuilder.

This commit tries to set runc as default runtime. If is not possible
(because docker not installed), the setup will continue.

Fixes: #897

Signed-off-by: Jose Carlos Venegas Munoz <821ab150128e889cb3ad9aab6e72689fd9ad26f2@intel.com>

devimc/tests,clearcontainers/tests,chavafg/tests,devimc/tests,chavafg/tests,clearcontainers/tests