upgrading cartodb-redis and redis-mpool

package.json

@@ -21,7 +21,7 @@
     "bunyan": "1.8.1",
     "cartodb-psql": "0.10.1",
     "cartodb-query-tables": "0.2.0",
-    "cartodb-redis": "0.14.0",
+    "cartodb-redis": "0.15.0",
     "debug": "2.2.0",
     "express": "~4.13.3",
     "log4js": "cartodb/log4js-node#cdb",
@@ -32,7 +32,7 @@
     "oauth-client": "0.3.0",
     "qs": "~6.2.1",
     "queue-async": "~1.0.7",
-    "redis-mpool": "0.4.1",
+    "redis-mpool": "0.5.0",
     "redlock": "2.0.1",
     "request": "~2.75.0",
     "step": "~0.0.5",