In one testing system, system_profiler command is said to be not found as seen in JDK-8241089. Since the tests were run on 11March bundle, where metal initialisation was stalled if Metal support was not present (which will be implied if system_profiler command is not found, as system_profiler command is used to detect Metal support presence) it results in failure of all the tests as Metal library were not initialised.
It is told to work when fullpath of system_profiler command is used.