Werk #6906: mk_jolokia: Fix crash upon mbean search

Component	Checks & agents
Title	mk_jolokia: Fix crash upon mbean search
Date	Nov 16, 2018
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.5.0p8 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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