Update sarama-cluster to latest release (#3560)

Godeps

@@ -4,7 +4,7 @@ github.com/amir/raidman c74861fe6a7bb8ede0a010ce4485bdbb4fc4c985
 github.com/apache/thrift 4aaa92ece8503a6da9bc6701604f69acf2b99d07
 github.com/aws/aws-sdk-go c861d27d0304a79f727e9a8a4e2ac1e74602fdc0
 github.com/beorn7/perks 4c0e84591b9aa9e6dcfdf3e020114cd81f89d5f9
-github.com/bsm/sarama-cluster ccdc0803695fbce22f1706d04ded46cd518fd832
+github.com/bsm/sarama-cluster abf039439f66c1ce78017f560b490612552f6472
 github.com/cenkalti/backoff b02f2bbce11d7ea6b97f282ef1771b0fe2f65ef3
 github.com/couchbase/go-couchbase bfe555a140d53dc1adf390f1a1d4b0fd4ceadb28
 github.com/couchbase/gomemcached 4a25d2f4e1dea9ea7dd76dfd943407abf9b07d29
@@ -65,7 +65,7 @@ github.com/samuel/go-zookeeper 1d7be4effb13d2d908342d349d71a284a7542693
 github.com/satori/go.uuid 5bf94b69c6b68ee1b541973bb8e1144db23a194b
 github.com/shirou/gopsutil 384a55110aa5ae052eb93ea94940548c1e305a99
 github.com/shirou/w32 3c9377fc6748f222729a8270fe2775d149a249ad
-github.com/Shopify/sarama c01858abb625b73a3af51d0798e4ad42c8147093
+github.com/Shopify/sarama 3b1b38866a79f06deddf0487d5c27ba0697ccd65
 github.com/Sirupsen/logrus 61e43dc76f7ee59a82bdf3d71033dc12bea4c77d
 github.com/soniah/gosnmp 5ad50dc75ab389f8a1c9f8a67d3a1cd85f67ed15
 github.com/StackExchange/wmi f3e2bae1e0cb5aef83e319133eabfee30013a4a5