Enable readability-container-size-empty tests

This one is a little trivial, but it does help in readability.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: I5366d4eec8af2f781b3bad804131ae2eb806e3aa
diff --git a/redfish-core/lib/update_service.hpp b/redfish-core/lib/update_service.hpp
index f820e61..3137ab3 100644
--- a/redfish-core/lib/update_service.hpp
+++ b/redfish-core/lib/update_service.hpp
@@ -824,7 +824,7 @@
                             continue;
                         }
 
-                        if (obj.second.size() < 1)
+                        if (obj.second.empty())
                         {
                             continue;
                         }