exception: Use MWExceptionHandler::logException in more places
Most code replaced wasn't exactly like what logException does
but most probably should be.
A few implementation differences with the code it replaced in
various places:
* MWException if-guards
Was there only to prevent a crash because getLogMessage is an
MWException method. Now that logException is generic, it seems
sensible to start logging those as well (follows-up
a97f3550a0).
* Exception::getTraceAsString
Now using MWExceptionHandler::formatRedactedTrace instead.
It wasn't using it because that method didn't exist yet.
Notes:
* DatabaseError::getLogMessage
Removed as this override was no longer doing anything (we're using
MWExceptionHandler::getLogMessage instead of $e->getLogMessage).
Introduced isLoggable() to take over the responsibility of indicating
when an exception should not be logged (follows-up
bcb9f9e1c0d).
* DeferredUpdates and Wiki.php
Both specificy MWException. Though ApiMain intends to catch all
and only logged MWException because it couldn't otherwise, these
actually only catch MWException (as opposed to catching all and
having an if-statement inside). Left those as-is to have them
continue propagate other exceptions.
* JobQueueFederated and JobQueueGroup
All specify to catch JobQueueError only.
Not sure whether it should catch other exceptions. It now can,
but I'll leave it as is in case it intends to have those be
handled elsewhere (or fatal).
Change-Id: I4578a0fe7d95a080f1a3b292ce7ae73a4d5fcaca