Werk #6047: docker_node_info: Fix crash in case docker process is not running

Component	HW/SW inventory
Title	docker_node_info: Fix crash in case docker process is not running
Date	Apr 29, 2018
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.6.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0b3 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

To the list of all Werks