test: Enable golint check

Author: andyzhangx

hack/verify-all.sh

@@ -20,8 +20,7 @@ readonly PKG_ROOT="$(git rev-parse --show-toplevel)"
 
 ${PKG_ROOT}/hack/verify-gofmt.sh
 ${PKG_ROOT}/hack/verify-govet.sh
-# disable due to travis issue
-#${PKG_ROOT}/hack/verify-golint.sh
+${PKG_ROOT}/hack/verify-golint.sh
 ${PKG_ROOT}/hack/verify-yamllint.sh
 ${PKG_ROOT}/hack/verify-boilerplate.sh
 ${PKG_ROOT}/hack/verify-spelling.sh