Seed2.jws: Write a warning to the log when getNetQueries() detects errors

Modified getNetQueries() method to write a warning to the log when an
error is found in the XML instead of generating an exception.

Signed-off-by: Eduardo Luis Buratti <elb09@inf.ufpr.br>
Acked-by: Erik Alexandre Pucci <eap08@c3sl.ufpr.br>