reduce error traces in priv and chassis code

These are not error paths so do not log them as errors

Tested:
- None other then CI. Changes are very simple.

Change-Id: I65b99b466ba2d59c304cd80c88c2c81b940829b9
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/redfish-core/include/privileges.hpp b/redfish-core/include/privileges.hpp
index 2fa979c..23eada6 100644
--- a/redfish-core/include/privileges.hpp
+++ b/redfish-core/include/privileges.hpp
@@ -262,10 +262,10 @@
     }
     for (auto& requiredPrivileges : operationPrivilegesRequired)
     {
-        BMCWEB_LOG_ERROR << "Checking operation privileges...";
+        BMCWEB_LOG_DEBUG << "Checking operation privileges...";
         if (userPrivileges.isSupersetOf(requiredPrivileges))
         {
-            BMCWEB_LOG_ERROR << "...success";
+            BMCWEB_LOG_DEBUG << "...success";
             return true;
         }
     }
diff --git a/redfish-core/lib/chassis.hpp b/redfish-core/lib/chassis.hpp
index 5a83793..b0c6291 100644
--- a/redfish-core/lib/chassis.hpp
+++ b/redfish-core/lib/chassis.hpp
@@ -135,8 +135,8 @@
             {
                 // do not add err msg in redfish response, because this is not
                 //     mandatory property
-                BMCWEB_LOG_ERROR << "DBUS error: no matched iface " << ec
-                                 << "\n";
+                BMCWEB_LOG_INFO << "DBUS error: no matched iface " << ec
+                                << "\n";
                 return;
             }
             // Iterate over all retrieved ObjectPaths.