[Elastica] Enabled on WMF cluster a few days ago

https://git.wikimedia.org/commitdiff/operations%2Fmediawiki-config/7acdc7e8c346f00dcce1412f057ea38ad3d3e649

Change-Id: I51f1f6c52d74ac0f06bd3f7c3ff0b6438fa39a9a