Werk #8941: db2_bp_hitratios: Do not crash if no hit ratio data is available on the related node

Component	Checks & agents
Title	db2_bp_hitratios: Do not crash if no hit ratio data is available on the related node
Date	Aug 22, 2019
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.0.0i1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.6.0b8 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0p22 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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