Updated mediawiki/extensions
Project: mediawiki/extensions/MathSearch  365b2337fa72c3cfc3f36519b34ae2a7210a192d

Prepare for using DB2 as Database backend.

This change prepares MathSearch to use rendering
engines other than mathWebSearch. UnitTests demonstrate
that DB2 can be used as database backend.

The integration to the user frontend will be a
follow up commit.

Change-Id: I4b947d7c7d37eb1409e7f3e57d9b1ff156b4c015