Enable Echo and Thanks on dewiki and itwiki

@Todo - echowikis.dblist is used by a cron to send daily/weekly digest email,
with Echo enabled on all wikis, this file becomes redundant, we can set the
cron to execute with foreachwiki blah.php instead of foreachwikiindblist dblist
blah.php

Change-Id: I924b108411556c7040d56ef1bcd42c0bd6aef851
Merge "Enable Echo and Thanks on dewiki and itwiki"