Update for deprecation of selectFields() methods

Authored by Anomie on Thu, Oct 12, 7:44 PM.

Description

Update for deprecation of selectFields() methods

Various selectFields() methods were deprecated in MediaWiki core change
Idcfd1556. This change adapts the extension to use the replacement
getQueryInfo() methods when available.

Change-Id: I300130c7b952a353ac28989d39d7f01366da2a37

Details