Fewer normal user errors at LOG_ERR level

Globalcollect has one eight-digit error code that maps to a large
variety of validation errors. The two exact problems I am
banishing from the system error log, are both the product of users
typing something silly at a form hosted not on our servers. We do
want to know if we have failed to validate things we have control
over, but these two are completely out of our hands, and
excruciatingly common.

@TODO: Refactor such that the error processing is all in
getResponseErrors, instead of spread out across multiple functions
for no identifiable reason

Change-Id: If8d610cbf79c14a7e4fa488955a506229da3dfae
Localisation updates from https://translatewiki.net.

Change-Id: Ic0493e95fb2a22a14dcae34ea0cb263658df7ab6
Localisation updates from https://translatewiki.net.

Change-Id: I9621654f9a255e6d97add76b2c2ab1773a9c6885
Localisation updates from https://translatewiki.net.

Change-Id: Id4bc3945aaeda0fff4c3be64f4ad1bf82ad263ab
Logging changes for DonationInterface

Demoting one line of total noise, and adding a bunch of lines for
debugging a session thing happing very occasionally in prod.

Change-Id: Ia669b69f3956920ccaa4fe31b4fa15f96e17e8c9
Merge "Logging changes for DonationInterface"
Merge branch 'master' into deploy

Conflicts:
	tests/Adapter/GlobalCollect/GlobalCollectTest.php

Change-Id: I54b3622aba48d2b1312337b901a539097235cae9