Clean up vCPE script

Signed-off-by: Yang Xu <yang.xu@futurewei.com>
Issue-ID: INT-847
Change-Id: I1158442cd73c6e0d943e9cc111cb12dae1381d36
diff --git a/test/vcpe/preload.py b/test/vcpe/preload.py
index 0108566..f4aafbe 100755
--- a/test/vcpe/preload.py
+++ b/test/vcpe/preload.py
@@ -13,6 +13,7 @@
 class Preload:
     def __init__(self, vcpecommon):
         self.logger = logging.getLogger(__name__)
+        self.logger.setLevel(logging.DEBUG)
         self.vcpecommon = vcpecommon
 
     def replace(self, sz, replace_dict):