Werk #4792: Fixed wrong unit in graph for tape utilization

Component	Checks & agents
Title	Fixed wrong unit in graph for tape utilization
Date	Jun 8, 2017
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.5.0i1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.4.0p3 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.2.8p24 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

The unit has been percent but the it's actually a counter for used tapes if all of them would be completely filled up. Thanks to Peter Husemann for this hint.

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