Werk #6981: dell_idrac_info: Fix inventory for certain aberrant date formats

Component	HW/SW inventory
Title	dell_idrac_info: Fix inventory for certain aberrant date formats
Date	Nov 30, 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) 1.5.0p9 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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