chore(deps): update code.arista.io/infra/barney/barnzilla-repos digest to 6909410 [skip travis]

This change is managed by the barney autoroller.
See http://go/barney-autoroller for more.

Author: barney-ci[bot]

barney.context

@@ -29,7 +29,7 @@
 			"commit": "e71a1ab04b5c56b8ad7962270df7cfdf31203d88"
 		},
 		"code.arista.io/infra/barney/barnzilla-repos": {
-			"commit": "5370d3928f37aae520f165cad808f74035af47c3"
+			"commit": "6909410e399d5dea26e40062ae8043816f30b83b"
 		},
 		"code.arista.io/infra/barney/tools/qube": {
 			"commit": "7ea12f3a4f3683689fd7670b26015bf374216d10"