Fix multiple keywords with the same name login found

Changes:
     - Fixed by giving the object full name of
       the keyword that the code intends to use.

Tested:
     - NA
Change-Id: I8cc98954dea7dcf27e6e490e18063df93e71a2ff
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/lib/xcat/xcat_utils.robot b/lib/xcat/xcat_utils.robot
index 40e8eea..55131cf 100644
--- a/lib/xcat/xcat_utils.robot
+++ b/lib/xcat/xcat_utils.robot
@@ -18,7 +18,7 @@
     # xcat_port  Network port on which XCAT server accepts ssh session.
 
     SSHLibrary.Open Connection  ${xcat_host}  port=${xcat_port}
-    Login  ${XCAT_USERNAME}  ${XCAT_PASSWORD}
+    SSHLibrary.Login  ${XCAT_USERNAME}  ${XCAT_PASSWORD}
 
 
 Execute Command On XCAT