Werk #5317: BI rules: Fixed renaming rule

Component	BI
Title	BI rules: Fixed renaming rule
Date	Oct 6, 2017
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.5.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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