remove the key_schema from options passed to redis

libraries/redis-wrapper/index.coffee

@@ -19,6 +19,7 @@ module.exports = RedisSharelatex =
 			Redis = require("ioredis")
 			standardOpts = _.clone(opts)
 			delete standardOpts.cluster
+			delete standardOpts.key_schema
 			client = new Redis.Cluster(opts.cluster, standardOpts)
 			client.healthCheck = RedisSharelatex.clusterHealthCheckBuilder(client)
 			RedisSharelatex._monkeyPatchIoredisExec(client)

libraries/redis-wrapper/test.coffee

@@ -73,12 +73,19 @@ describe "index", ->
 			@settings =
 				cluster: @cluster
 				redisOptions: @extraOptions
+				key_schema: {foo: (x) -> "#{x}"}
 
 		it "should pass the options correctly though with no options", ->
 			client = @redis.createClient cluster: @cluster
 			assert(client instanceof @ioredis.Cluster)
 			client.config.should.deep.equal @cluster
 
+		it "should not pass the key_schema through to the driver", ->
+			client = @redis.createClient cluster: @cluster, key_schema: "foobar"
+			assert(client instanceof @ioredis.Cluster)
+			client.config.should.deep.equal @cluster
+			expect(client.options).to.deep.equal {retry_max_delay: 5000}
+
 		it "should pass the options correctly though with additional options", ->
 			client = @redis.createClient @settings
 			assert(client instanceof @ioredis.Cluster)