util: Fix tracevol to use --config for oc only

tracevol.py uses --config instead of --kubeconfig when invoked with
-c kubectl and -k <some_path> at the same time.

Signed-off-by: Santiago Sanchez Paz <sanchezpaz@gmail.com>

troubleshooting/tools/tracevol.py

@@ -502,6 +502,7 @@ def get_pv_data(arg, pvname):
     pvdata = {}
     cmd = [arg.command]
     if arg.kubeconfig != "":
+        if arg.command == "oc":
             cmd += ["--config", arg.kubeconfig]
         else:
             cmd += ["--kubeconfig", arg.kubeconfig]