Werk #14061: ibm_svc_systemstats: Fix crash in discovery

Component	Checks & agents
Title	ibm_svc_systemstats: Fix crash in discovery
Date	Jul 1, 2022
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.2.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

ibm_svc_systemstats would crash during discovery for stats with decimal values. Now, we cast those values to floats.

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