Do not attempt out of range access in testCcdbDatabase

I suspect that the intention of this line was to print first 10 characters, not print all after 10th character.

This does not fix the reason for the testCcdbDatabase failures, but let's the test complete without getting an unhandled exception.

Author: knopers8

Framework/test/testCcdbDatabase.cxx

@@ -295,7 +295,7 @@ void askObject(std::string objectPath)
   auto json = backendGlobal->retrieveJson(objectPath, -1, metadata);
   cout << "std::string::max_size(): " << std::string().max_size() << endl;
   cout << "json string size: " << json.size() << endl;
-  cout << "object " << json.substr(10) << endl;
+  cout << "object " << json.substr(0, 10) << endl;
   BOOST_CHECK(!json.empty());
   cout << "finished " << endl;
 }