Change to use new 'BMC Execute Command'.

Changes to use new 'BMC Execute Command' and to stop using
'Open Connection and Log In'.

Change-Id: Iab86623f8835845913233cfe2cb858c93b5e39b6
Signed-off-by: Michael Walsh <micwalsh@us.ibm.com>
diff --git a/lib/utils.robot b/lib/utils.robot
index d53aac1..2453e1a 100755
--- a/lib/utils.robot
+++ b/lib/utils.robot
@@ -9,6 +9,7 @@
 Library                 gen_robot_print.py
 Library                 gen_cmd.py
 Library                 gen_robot_keyword.py
+Library                 bmc_ssh_utils.py
 
 *** Variables ***
 ${pflash_cmd}           /usr/sbin/pflash -r /dev/stdout -P VERSION
@@ -54,8 +55,7 @@
 Get BMC System Model
     [Documentation]  Get the BMC model from the device tree.
 
-    Open Connection And Log In
-    ${bmc_model}  ${stderr}=  Execute Command
+    ${bmc_model}  ${stderr}  ${rc}=  BMC Execute Command
     ...  cat ${devicetree_base} | cut -d " " -f 1  return_stderr=True
     Should Be Empty  ${stderr}
     Should Not Be Empty  ${bmc_model}