The ksm parameter was saved incorrectly

Wrong ksm parameter was saved in `save_ksm_settings` when testing ksm, which can affect the restore phase.
```
# Save the current KSM settings so we can restore them later
save_ksm_settings(){
	echo "saving KSM settings"
	ksm_stored_run=$(cat ${KSM_ENABLE_FILE})
	ksm_stored_pages=$(cat ${KSM_ENABLE_FILE})
	ksm_stored_sleep=$(cat ${KSM_ENABLE_FILE})
}
```