Fix avrorouter type and name handling

The type and name parsing functions could move outside of allocated memory
as they didn't check for the terminating null character. Also fixed the
printf format string used when the list of used tables is being created.

Fixed CDC testing connector to abort on error and added some extra output
to the cdc_datatypes test.

maxscale-system-test/cdc_connector.cpp

@@ -204,6 +204,14 @@ bool Connection::readRow(std::string& dest)
         else
         {
             dest += buf;
+
+            if (dest[0] == 'E' && dest[1] == 'R' & dest[2] == 'R')
+            {
+                m_error = "Server responded with an error: ";
+                m_error += dest;
+                rval = false;
+                break;
+            }
         }
     }