Cable: Fix Logging Level Error

When we have an internal error, having the D-Bus response is really
helpful. Follow our guide and have these be a Logging Level Error.

Tested: None. Inspection only.

Change-Id: Ie1d9f364c3af7f2a8839d878d68c82c10ddc0429
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/redfish-core/lib/cable.hpp b/redfish-core/lib/cable.hpp
index a2d0b53..bc73267 100644
--- a/redfish-core/lib/cable.hpp
+++ b/redfish-core/lib/cable.hpp
@@ -30,7 +30,7 @@
 {
     if (ec)
     {
-        BMCWEB_LOG_DEBUG("DBUS response error {}", ec);
+        BMCWEB_LOG_ERROR("DBUS response error {}", ec);
         messages::internalError(resp);
         return;
     }