reactor utilization should return the utilization in 0-1 range
reactor utilization should return the utilization in 0-1 range

The reactor load parameter repot the percentage the cpu is not in used.
the utilization metric should report the revert.

Fixes #248

Signed-off-by: Amnon Heiman <ed5fc74c4692051ad0b19749fd7cea6ec2d74b9e@scylladb.com>
Message-Id: <1487678487-5029-1-git-send-email-ed5fc74c4692051ad0b19749fd7cea6ec2d74b9e@scylladb.com>

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