Added tcwg-benchmark to user allowed to ssh into bkp01

Change-Id: I1134369c863c90f2312e966bf0954f2a734341dc
diff --git a/host_vars/bkp-01.tcwglab b/host_vars/bkp-01.tcwglab
index d5acbac..640da44 100644
--- a/host_vars/bkp-01.tcwglab
+++ b/host_vars/bkp-01.tcwglab
@@ -24,3 +24,4 @@
  - tcwg
  - nagios
  - tcwg-buildslave
+ - tcwg-benchmark