lisa.tests.scheduler.load_tracking: CPUMigrationBase Take into account variable frequency
lisa.tests.scheduler.load_tracking: CPUMigrationBase Take into account variable frequency

We set the performance cpufreq governor, but that does not mean the test will
actually run at max frequency. Some thermal capping can come into play and lower
the frequency. To counteract that, take into account the average frequency
during each phase to adjust the expected duty cycle.

credp/lisa,credp/lisa,credp/lisa,ARM-software/lisa,ARM-software/lisa,ARM-software/lisa,credp/lisa,ARM-software/lisa