Run etcd as etcd user (#119)

Author: hectorhuertas

resources/etcd-member.service

@@ -15,6 +15,8 @@ Restart=on-failure
 RestartSec=10s
 TimeoutStartSec=0
 LimitNOFILE=40000
+User=etcd
+Group=etcd
 
 Environment="ETCD_DATA_DIR=/var/lib/etcd"
 Environment="ETCD_NAME=member${index}"