Add "SSHLibrary." qualifier to "Open Connection" invocation.

This failed when called by obmc_boot_test.robot.

Change-Id: I0b1a803a476ba0676675035e3110c8d9a0bea8e3
Signed-off-by: Michael Walsh <micwalsh@us.ibm.com>
diff --git a/lib/pdu/synaccess.robot b/lib/pdu/synaccess.robot
index 0810ec3..98f7211 100644
--- a/lib/pdu/synaccess.robot
+++ b/lib/pdu/synaccess.robot
@@ -7,7 +7,7 @@
 *** Keywords ***
 Connect and Login
     Validate Prereq
-    Open Connection     ${PDU_IP}
+    SSHLibrary.Open Connection  ${PDU_IP}
     ${auth}=    Create List     ${PDU_USERNAME}    ${PDU_PASSWORD}
     Create Session    pdu    http://${PDU_IP}   auth=${auth}