Werk #5747: fix daylight saving time error

Component

Reporting & availability

Title

fix daylight saving time error

Date

Mar 8, 2018

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

1.5.0b1	Checkmk Enterprise (CEE), Checkmk MSP (CME)
1.4.0p27	Checkmk Enterprise (CEE), Checkmk MSP (CME)

When the actual time was inside/outside the daylight saving time and a report was outside/inside the daylight saving time the calculated time for the last or next scheduled reports was off by 1h. This is fixed now by using the dateutil library internally.

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