Werk #6853: Fixed host diagnose not using SNMP retry of 0

Component	Setup
Title	Fixed host diagnose not using SNMP retry of 0
Date	Nov 8, 2018
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.6.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.5.0p8 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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