Update gopsutil version to v2.18.03

Godeps

@@ -66,7 +66,7 @@ github.com/prometheus/procfs 1878d9fbb537119d24b21ca07effd591627cd160
 github.com/rcrowley/go-metrics 1f30fe9094a513ce4c700b9a54458bbb0c96996c
 github.com/samuel/go-zookeeper 1d7be4effb13d2d908342d349d71a284a7542693
 github.com/satori/go.uuid 5bf94b69c6b68ee1b541973bb8e1144db23a194b
-github.com/shirou/gopsutil 5776ff9c7c5d063d574ef53d740f75c68b448e53
+github.com/shirou/gopsutil fc04d2dd9a512906a2604242b35275179e250eda
 github.com/shirou/w32 3c9377fc6748f222729a8270fe2775d149a249ad
 github.com/Shopify/sarama 3b1b38866a79f06deddf0487d5c27ba0697ccd65
 github.com/Sirupsen/logrus 61e43dc76f7ee59a82bdf3d71033dc12bea4c77d