D20163: Replace currentDateTimeUtc().toTime_t() with currentSecsSinceEpoch()

[Aleix Pol Gonzalez]

apol accepted this revision.
This revision is now accepted and ready to land.

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REVISION DETAIL
  https://phabricator.kde.org/D20163

To: bruns, #frameworks, apol
Cc: kde-frameworks-devel, michaelh, ngraham, bruns