[nestmates] runtime/HiddenClasses/StressHiddenClasses.java timeout with Graal

----------messages:(7/306)----------
command: main StressHiddenClasses
reason: User specified action: run main/othervm StressHiddenClasses
Mode: othervm [/othervm specified]
Additional options from @modules: --add-modules java.compiler,java.management
Timeout information:
--- Timeout information end.
elapsed time (seconds): 1248.032
----------configuration:(3/60)----------
Boot Layer
  add modules: java.compiler java.management

----------System.out:(1/28)----------
Timeout refired 1200 times