Werk #7751: storeonce_servicesets: Do not crash on capacity checking

Component	Checks & agents
Title	storeonce_servicesets: Do not crash on capacity checking
Date	Jun 24, 2019
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.6.0b3 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0p19 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Wrong yield leads to "TypeError (object of type 'generator' has no len())". This has been fixed.

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