Werk #12891: Memory: Duplicate service for some dual hosts (ucd_mem, statgrab_mem)

Component	Checks & agents
Title	Memory: Duplicate service for some dual hosts (ucd_mem, statgrab_mem)
Date	May 17, 2021
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.1.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 2.0.0p5 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

For some dual hosts (TCP and SNMP) the memory service has been discovered twice.

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