Enable servlet db test

curl http://192.168.122.89:8081/servlet/db

How to prepare the db:

cat > mysql.txt << EOF
drop database if exists hello_world;
create database hello_world;
use hello_world;
drop table if exists World;
CREATE TABLE World ( id int primary key auto_increment, randomNumber
int);
EOF

for i in `seq 1 10000`;do
        echo "insert into World (randomNumber) values (123456);"  >> mysql.txt
done

mysql -uroot -p -h your_db_ip < mysql.txt

Signed-off-by: Asias He <asias@cloudius-systems.com>