Add try block in _prepareQuery#793

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VonHirsch wants to merge 2 commits intoThingEngineer:masterfrom

VonHirsch:try-reconnect

Commits on Oct 10, 2018

Add try block in _prepareQuery so that database will reconnect automatically if connection was broken (tested)
VonHirsch
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Add try block in _prepareQuery so that database will reconnect automatically if connection was broken #2 (tested)
VonHirsch
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