Need 'Get BMC System Model' to actually run in test mode.

Other functions depend on the model being set correctly.

Change-Id: I2164c70f734c686924b0685b47e170ea1448cc38
Signed-off-by: Michael Walsh <micwalsh@us.ibm.com>
diff --git a/lib/utils.robot b/lib/utils.robot
index 30aa4d4..58a73e8 100755
--- a/lib/utils.robot
+++ b/lib/utils.robot
@@ -81,6 +81,7 @@
 
     ${bmc_model}  ${stderr}  ${rc}=  BMC Execute Command
     ...  cat ${devicetree_base} | cut -d " " -f 1  return_stderr=True
+    ...  test_mode=0
     Should Be Empty  ${stderr}
     Should Not Be Empty  ${bmc_model}
     [Return]  ${bmc_model}