Werk #6394: winperf_processor: Changed CPU utilization default levels to 90, 95 percent

Previously the default levels were set to 101, 101 percent which is in most cases equivalent to 'no levels'.

These levels are configurable via the WATO rule {{CPU utilization for simple devices}} and can be disabled, too.

A rediscovery is required for affected hosts. Please open and re-save the affected rules to avoid ineffective rulesets in some particular cases.

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