Add database replication delay handling to Echo
Add database replication delay handling to Echo

patch set 3: Use Title::GAID_FOR_UPDATE instead of 1/0

Change-Id: I16bcec3699daaa143599cd50751521114f56aec3

wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo