Ran power_Standby on nocturne (full 12 hours version)

Traceback (most recent call last):
  File "/usr/local/autotest/common_lib/test.py", line 600, in _exec
    _call_test_function(self.execute, *p_args, **p_dargs)
  File "/usr/local/autotest/common_lib/test.py", line 800, in _call_test_function
    return func(*args, **dargs)
  File "/usr/local/autotest/common_lib/test.py", line 472, in execute
    self.process_failed_constraints()
  File "/usr/local/autotest/common_lib/test.py", line 297, in process_failed_constraints
    raise error.TestFail(msg)
TestFail: iteration 0:could not evaluate constraint: milliwatts_standby_power <= 500.00  


We refactor this test to remove "milliwatts_standby_power" but didn't remove constraint.