Waiting for gRPC disconnect to complete before removing BBSim device

Change-Id: I9c0e035a380dcc55ef20a2c0ef980f7ede66cc0a
diff --git a/libraries/utils.robot b/libraries/utils.robot
index 359ed4a..38c28d0 100755
--- a/libraries/utils.robot
+++ b/libraries/utils.robot
@@ -30,7 +30,7 @@
 Check CLI Tools Configured
     [Documentation]    Tests that use 'voltctl' and 'kubectl' should execute this keyword in suite setup
     # check voltctl and kubectl configured
-    ${voltctl_rc}    ${voltctl_output}=    Run And Return Rc And Output    voltctl device list
+    ${voltctl_rc}    ${voltctl_output}=    Run And Return Rc And Output    voltctl -c ${VOLTCTL_CONFIG} device list
     Log    ${voltctl_output}
     ${kubectl_rc}    ${kubectl_output}=    Run And Return Rc And Output    kubectl get pods
     Log    ${kubectl_output}