Werk #2576: symantec_av_updates: fix crash due to missing datetime module, also handle DD.MM.YYYY date format

Component Checks & agents
Title symantec_av_updates: fix crash due to missing datetime module, also handle DD.MM.YYYY date format
Date Sep 3, 2015
Checkmk Edition Checkmk Raw (CRE)
Checkmk Version 1.2.7i3
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

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