set start and stop timeout in etcd service

This timeout will ensure etcd service will have enough of time to start.

Remove alias to etcd2 since it is deprecated.

Change-Id: I0ae2e1cdbfe59ea79d40a1a690d0440e6d86a605
diff --git a/etcd/files/systemd/etcd.service b/etcd/files/systemd/etcd.service
index 6414481..154e715 100644
--- a/etcd/files/systemd/etcd.service
+++ b/etcd/files/systemd/etcd.service
@@ -17,7 +17,7 @@
 Restart=on-abnormal
 #RestartSec=10s
 LimitNOFILE=65536
+TimeoutSec=120
 
 [Install]
 WantedBy=multi-user.target
-Alias=etcd2.service